Which of this is a plan that offered the constitutional convention a proposal for representation?

Answer:
The New Jersey Plan
Explanation:
The New Jersey Plan was the plan that offered the Constitutional Convention a proposal for representation. This proposal was presented by William Patterson at the Constitutional Convention in 1787, as a response to the Virginia Plan. The New Jersey Plan proposed a one-vote-per-state representation in the legislative body of the new nation. This was supported by smaller states, but was opposed by James Madison and other supporters of the Virginia Plan.