Why was the Mexican government worried about the number of Americans moving into the region?

a. They wanted Spanish to be the main language, and feared Anglo culture becoming dominant.

b. They worried about upsetting the Native Americans, who had a better relationship with the Mexicans than they did with the Americans

c. They worried about the potential loss of revenue, because they couldn’t tax the Americans.

d. They feared Texas was becoming overrun by Americans and worried about a possible revolt.