Final answer:
The false statement is that tensions over slavery caused many Texans to join the Know-Nothing Party, which was primarily anti-immigrant and anti-Catholic.
Step-by-step explanation:
The statement that is FALSE among the ones provided is d. Tensions over slavery caused many Texans to join the Know-Nothing Party. While the Know-Nothing Party was active during a time of national tensions over slavery, its primary focus was on anti-immigrant and anti-Catholic sentiments, rather than issues directly pertaining to slavery. On the contrary, other statements provided reflect historical truths regarding the disenfranchisement and challenges faced by African Americans, both free and enslaved, in Texas. For example, after achieving freedom, African American freedmen did indeed face significant obstacles, including institutional racism and violence, and had to navigate a