Correct Option: B. Last-In, First-Out (LIFO) Explanation of the Correct Answer: The Last-In, First-Out (LIFO) inventory valuation method assumes that the most recently purchased or produced items are the first to be sold. This means that during periods of rising prices, the costs associated with the most recent inventory purchases (which are higher) are used to calculate the cost of goods sold (COGS). Step-by-Step Breakdown:

1. Understanding Inventory Valuation Methods:
2. FIFO (First-In, First-Out): Assumes that the oldest inventory items are sold first. In times of rising prices, this means that the lower costs of older inventory are matched against current revenues, resulting in higher net income.
3. LIFO (Last-In, First-Out): Assumes that the newest inventory items are sold first. In times of rising prices, this results in higher COGS because the most recent, higher costs are used, leading to lower net income.
4. Weighted Average Cost: Averages the cost of all inventory items available for sale during the period and applies this average cost to COGS. This method smooths out price fluctuations.
5. Specific Identification: Tracks the actual cost of each specific item sold. This method is often used for unique or high-value items.
6. Impact on Net Income:
7. Under LIFO, when prices are rising, the higher costs of the most recent inventory are matched against revenues, leading to a higher COGS and, consequently, a lower net income. This can be beneficial for tax purposes, as lower net income results in lower taxable income.
8. Example Calculation:
9. Suppose a company has the following inventory purchases:
   • 100 units at $10 each (oldest)
   • 100 units at $12 each (newest)
10. If the company sells 150 units, under LIFO, the COGS would be calculated as follows:
    • 100 units from the $12 batch = $1,200
    • 50 units from the $10 batch = $500
    • Total COGS = $1,200 + $500 = $1,700
11. If FIFO were used instead, the COGS would be:
    • 100 units from the $10 batch = $1,000
    • 50 units from the $12 batch = $600
    • Total COGS = $1,000 + $600 = $1,600
12. Thus, LIFO results in a higher COGS ($1,700) compared to FIFO ($1,600), leading to lower net income under LIFO.

Explanation of Why Other Options Are Incorrect:

• A. First-In, First-Out (FIFO):
• FIFO assigns the oldest costs to COGS. In a period of rising prices, this results in lower COGS and higher net income, which is the opposite of what the question asks.
• C. Weighted Average Cost:
• This method averages the costs of all inventory items, leading to a middle-ground effect on COGS. It does not specifically assign the most recent costs to COGS, making it less relevant to the question.
• D. Specific Identification:
• This method tracks the actual cost of each specific item sold. While it can provide accurate COGS for unique items, it does not inherently favor recent costs over older costs, making it unsuitable for the scenario described.

Revision Summary:

• LIFO assigns the most recent costs to COGS, leading to lower net income during rising prices.
• FIFO assigns the oldest costs to COGS, resulting in higher net income in the same scenario.
• Weighted Average Cost smooths out price fluctuations and does not focus on recent costs.
• Specific Identification tracks individual item costs and is not influenced by the timing of purchases.