Those who serve in the senate are called what? and those who serve in the house of representatives are called what?

The Schlieffen Plan

Explanation:

The question asks us what was the German strategy for fighting a two front war.

In World War I, Germany was fighting a two front war, at Russia and France. The Schlieffen Plan was created about a decade before WWI.

The goal of the strategy was to prevent a two front war. Germany didn’t want to fight at both fronts at once. They hoped to swiftly defeat the French in the west, then rush to Russia and attack. Ultimately, the plan didn’t succeed.

Therefore, the correct answer choice is the Schlieffen Plan.