Answer:
B. surrender of Santa Anna
Step-by-step explanation:
Santa Anna initially promised the Texans that he's going to give the Texans with autonomy to rule their own state. But several years after making the promise, Santa Anna changed his position and wanted to acquire all of the resources in Texas and turned it into a part of Mexico's centralized Economy. Many Texans hated him for this decision.
This led to the conflict in San Jacinto. Texans won that war and managed to capture Santa Anna. As a terms of his surrender, Santa Anna promised to give Texas full autonomy and completely redacted Mexican's army presence from that state.