I would say prospect of jobs or lands
Purchase of Alaska
Just looked it up
You could say that it is laws regarding slavery. One of his basic laws way back in 1066 was that no man shall sell another men, or they would pay a fine. This basically outlawed slavery in Britain. However, they enslaved Africans because they didn't consider Africans to be men later when exploration of Africa began.
Idk what A B C and D answers are but I know that the answer to the question is Texas (not sure about territory tho)