Answer:
a. to protect the settlers from attack
Step-by-step explanation:
The missions of San José y San Miguel de Aguayo was originally established in East Texas. The purpose is to make the locals or native Americans become Christians and teach them essential skills.
However, after the break out of the Chicken War in 1719 between French and Spanish. The Aguayo Mission was moved down to South Texas in San Antonio. This is to safeguard the Spanish settlers from the war, so they will be able to continue to carry on the mission.
Hence, in this case, the correct answer is option A: To protect the settlers from attack