What was the primary function of the Texas Rangers during the U. S.-Mexican War? A. Kill any Mexican soldier found on the northern side of the Rio Grande in order to prevent a Mexican invasion.

B. Round up Native Americans and transport them to the territory provided to them by the United States government.

C. Protect supply lines and gain vital information in order to assist the United States with the war against Mexico.

D. Intimidate Mexicans and Natives who were still living in Texas in order to maintain Maribeau Lamar’s policies.