Read the Mexican government’s Bustamante Decree of April 1830. Article 9. The introduction of foreigners across the northern frontier is prohibited under any pretext whatsoever, unless the said foreigners are provided with a passport issued by the agent of the republic at the point whence the said foreigners set out.

Article 10. No change shall be made with respect to the slaves now in the states, but the Federal government and the government of each state shall most strictly enforce the colonization laws, and prevent the further introduction of slaves.

According to this decree, how did Mexico react to immigrants in 1830?

A. It welcomed them as new citizens.
B. It forced them to obtain passports from their native countries.
C. It welcomed them as long as they agreed to colonize territory.
D. It forced them to show support for slavery.