What was the “root issue” that prevented Congress from adding Texas to the U.S. for many years? Responses A the Civil Warthe Civil War B the issue of slaverythe issue of slavery C a treaty with Mexicoa treaty with Mexico D the Monroe Doctrine

Answer 1

The "root issue" that prevented Congress from adding Texas to the U.S. for many years was primarily B the issue of slavery. The annexation of Texas raised significant concerns over the expansion of slavery into new territories, which was a contentious subject in U.S. politics at the time.