The mission system in California was more successful than that which
existed in Texas because

president thomas jefferson commissioned the expedition shortly after the louisiana purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an american presence in this territory before britain and other european powers

i believe the answer is d. it was not uncommon for people to faint or even convulse at these high-energy meetings.