Answer:
Correct answer is A plan that called for Mexico's independence from Spain.
Step-by-step explanation:
First option is not correct as it refers to the Texas declaration of Independence.
Second option is not correct as that refers to the famous "Cry of Dolores."
Third option is not correct as it refers to Louisiana Purchase Treaty.
Fourth option is correct as it refers to the plan from 1821, created when Mexicans practically defeated Spaniards.