Ritchie valens is considered the first rock star in the united states who did he influence?

Ritchie Valens is considered a pioneer of "Latin Rock" and influenced many mexican musicians. He was influence to "Los Lobos" and some say that even Carlos Santana himself.

The border dispute between Mexico and Texas affect the Mexican-American WarIt as it  became a source of conflict once Texas became a part of the United States. Option A is correct.

Mexican-American War was a war between the United States and Mexico fro April 1846 to February 1848 that arised from the United States’ annexation of Texas in 1845 and from a dispute over whether Texas ended at the Nueces River or the Rio Grande.