Which of the following played the greatest role in the British conquest of Nigeria?

The Royal Niger Company played the greatest role in the British conquest of Nigeria. The company was a British-chartered company that was granted a royal charter in 1886 to control and administer the territories of the Niger Delta and the surrounding areas. The company had its own private army, and it used force to establish British control over the region, including the use of military expeditions against resistance from indigenous communities. The company played a key role in the colonization of Nigeria and the eventual establishment of British colonial rule over the region.