Answer:
Europeans/White people
Explanation:
If it wants an even further answer you could be more specific and describe the different groups of Europeans ie. Aryans, Celts, Fins etc.
(1) sign or veto bills passed by Congress
The correct answer is A. Radical Republicans.
The Fifteenth Amendment gave people of color the right to vote, so D is definitely incorrect. B is incorrect too because labor union organizers wanted all workers to have the same rights. C is incorrect because by passing this Amendment, it would mean better prospects for women too. This leaves us with A, given that these Republicans were the ones who owned slaves in the first place.
America and Great Britain.<span />
It halted Japanese expansion to the east. :)