Which of the following statements is false?

a.

Saltillo was the capital of Coahuila y Texas.

b.

Mexico became a republic in 1821.

c.

To encourage immigration, Mexico made no restrictions in its colonization laws.

d.

Under the Mexican colonization laws, states could have their own colonization laws within reason. PLZZZZ HELP ME AND HOWWEVER ANSWERS FIRST GETS 30 PONTS AND BRAINLIST BUT THEN ANSWER HAS TO BE RIGHT