The poster links food rationing to

saving money.
defeating germany.
suffering in wartime.
recruiting soldiers.

The second answer, defeating Germany.

★ French Guiana, overseas territorial collectivity of France, situated on the northeastern coast of South America. French Guiana is bounded by Brazil to the south and east, Suriname to the west, and the Atlantic Ocean to the northeast. The capital is Cayenne.

Explanation:

Hope can help you.

Keep on learning.