Presidents Jackson and Van Buren Hesitated to Extend Recognition to and to Annex

Presidents Jackson and Van Buren hesitated to extend recognition to and to annex the new Texas Republic because

A) Texans did not want to be annexed to the United States.
B) antislavery groups in the United States opposed the expansion of slavery.
C) they were old political opponents of the Texas president, Sam Houston.
D) public opinion in the United States opposed annexation.
E) they feared war with Mexico's ally, Spain.