Question

What was a long-term effect of the events pictured in the map?

Migration of settlers from Texas into Mexico
Congress voted to go to war with Mexico
Increased military presence on the Texas/Mexico border
Established the Southern border of the United States

Answer 1

I think it is the last one

Step-by-step explanation:

Established the Southern border of the United States

Answer 2

It would be: D. Established the Southern border of the United States.