Which title best completes this list? 1. The potential for new markets
2. An abundance of inexpensive farmland
3. The discovery of gold

A. Economic Motives for Passing the Northwest Ordinance
B. Reasons for Issuing the Monroe Doctrine
C. Economic Motives for Manifest Destiny Policies
D. Reasons for the Gadsden Purchase

How did the united states respond when north vietnam attacked a us warship and sent troops to south vietnam in the early 1960s? a.the united states declined to assist south vietnam against the north. b.us leaders authorized south vietnam to invade north vietnam. c.the president did not sign the gulf of tonkin resolution. d.congress authorized the president to escalate the conflict.