Which territorial acquisition- excluding the original United States-- added the greatest number of states to the nation?

Question

Gadsden Purchase THIS ONE
Louisiana Purchase
Mexican Cession
Oregon Territory

Which of the following best describes the impact of manifest destiny?

It influenced the religious beliefs of many Americans.
It helped make Mexico a better ally.
It caused the United States to focus on the East and Ignore the West.
It pushed the United States to gain new lands through warfare and treaties. THIS ONE

Answer 1

1 a - no
2 d - yes

Answer 2

Would c be right for number 1?

Answer 3

No. I've checked two of your guesses, and now you're on your own. Please do not post that question again.