Their plan was called the Anaconda plan. They wanted to blockade the Southern coast to prevent them from receiving resources from other countries. They also wanted to capture the Mississippi River to effectively cut the Confederacy in half (Battle of Vicksburg). The final step in their plan was to capture the Confederate capital city (Richmond).
In the late 1840's Mexicans living in territory ceded by Mexico faced the challenge of having their families split across two nations. The answer to your question is D.
