Correct Option: D. Royal Niger Company Detailed Explanation: The Royal Niger Company (RNC) was a significant player in the expansion of British influence in Northern Nigeria during the 1890s. Here’s a step-by-step breakdown of why this option is correct:

1. Historical Context: In the late 19th century, European powers were engaged in the "Scramble for Africa," where they sought to expand their territories and influence across the continent. Nigeria, rich in resources and strategically located, became a focal point for British interests.
2. Role of the Royal Niger Company: The Royal Niger Company was established in 1886 and was granted a charter by the British government, giving it the authority to administer and develop trade in the Niger River region. The company was instrumental in establishing British control over the area, particularly in Northern Nigeria.
3. Economic Interests: The RNC was primarily motivated by economic interests, focusing on the trade of palm oil, rubber, and other resources. To secure these interests, the company engaged in treaties with local leaders, established trading posts, and sometimes used military force to protect its operations.
4. Political Influence: The RNC not only engaged in trade but also played a political role by negotiating treaties that effectively placed local leaders under British influence. This laid the groundwork for the eventual formal annexation of Nigeria by the British government.
5. Military Actions: The company also had its own armed forces, which it used to assert control over territories and suppress resistance. This military capability allowed the RNC to expand its influence more aggressively than other entities at the time.

Why the Other Options are Incorrect:

• A. British Consul in Calabar: While the British Consul in Calabar had some influence in the southern regions of Nigeria, his role was not as pivotal in the expansion of British influence in Northern Nigeria. The focus of the consulate was more on trade and diplomatic relations in the south rather than the northern territories.
• B. Royal West African Frontier Force: This military unit was established later (in 1897) and was primarily used for military operations in West Africa. While it played a role in maintaining British control, it was not the leading agent in the initial expansion of influence in Northern Nigeria during the 1890s.
• C. British Consul in Lagos: Similar to the consul in Calabar, the British Consul in Lagos was more focused on the southern regions of Nigeria. His influence did not extend significantly into Northern Nigeria, where the Royal Niger Company was the dominant force.

Summary of Key Points:

• The Royal Niger Company was the leading agent in expanding British influence in Northern Nigeria during the 1890s.
• It combined economic interests with political and military actions to establish control over the region.
• Other options, such as the British Consuls and the Royal West African Frontier Force, did not play a significant role in this specific context.
• Understanding the historical context of British colonial expansion is crucial for grasping the dynamics of power in Nigeria during this period.