Blank are people who choose to move because they want to pursue opportunities in new areas or who are forced to leave to avoid problems in their home countries

Migrants

-- a person who moves from one place to another, especially in order to find work or better living conditions.

just like you man, i personally think its either c or d

explanation:

but good luck with the test man

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).