Which action was taken by mexican americans in 1966 to secure increased civil rights?

a. they boycotted all products made in texas
b. they formed an alliance with texas republicans
c. they marched from the rio grande valley to austin
d. they filed a lawsuit challenging segregation in the schools

They allied with Texas Republicans is the right answer.

Explanation:

The American civil right was fundamental in the 1960s. The congress, on the contrary, had an active role in the passing of civil rights. The leaders, therefore, engaged the African voters through new technologies and sacrifices that gave the leaders the freedom that they waited for a long time

The movement of the people’s rights contributed mainly to the progress during that time. The emergence of the evolution of Chicano made the Mexican American determined to seize the political power and celebrating their heritage.

i'd have to with d.

explanation: