The correct answer is:
a. Sam Houston, the leader of the Tejano forces. He used this as a battle cry after Santa Anna and his troops attacked the Alamo.
"Remember the Alamo!" became a rallying cry for Texian soldiers during the Texas Revolution, symbolizing their struggle for independence from Mexico following the defeat at the Alamo in March 1836. It served to evoke a sense of unity and determination among Texian forces in their fight against the Mexican army.