What is the name of the plan proposed by the larger states for a new
Congress?

Great Compromise of 1787

Explanation:

The Great Compromise of 1787 (also known as The Connecticut Compromise or Sherman Compromise) was an agreement that large and small states reached during the Constitutional Convention of 1787 that in part defined the legislative structure and representation that would have under the United States Constitution.

sonar maybe? ? i dont know the choices