Final answer:
The correct answer is option a) William Travis.
Step-by-step explanation:
During the siege of the Alamo, it was General Antonio Lopez de Santa Anna who demanded that the defenders surrender. However, the commander of the Alamo, W.B. Travis, along with his men, were determined to continue the fight and chose not to surrender or retreat.
Despite their efforts, after ten days of siege, the Alamo was taken and nearly all the defenders, including Travis and James Bowie, were killed. Further, after the battle of the Alamo, Santa Anna's army faced defeat at the Battle of San Jacinto, led by Sam Houston.