What action(s) did the American colonists meeting at San Felipe, Texas

What action(s) did the American colonists meeting at San Felipe, Texas in 1833 take in response to the increased exercise of Mexican political and economic control over Texas?

A) The American colonists declared war on Mexico and established the independent republic of Texas.
B) The American colonists sent Steven F. Austin to Washington, D.C. to meet with President Martin Van Buren and Congressional leaders in order to request U.S. military assistance in their plans for revolt.
C) The American colonists organized an army and sent Steven F. Austin to Mexico City to negotiate with the Mexican government about obtaining a broad grant of autonomy for Texas within the Republic of Mexico.
D) The American colonists organized a referendum vote of Americans and Tejanos on the issue of whether Texas should declare its independence from Mexico.

ANSWER
Answer: C