The main reason some people in the United States did not want to annex Texas was that
OA.
Texas was too big to be a state.
OB.
Texas was still a part of Mexico.
OC. Texas had a huge national debt.
OD. Texas would be a slave state.
The answer is D because since Texas was a southern state, it upset the Northerners (who abolished slavery) that the US would be adopting a slave state.