Read the following lines from "Federalist Paper 2" by Hamilton, and answer the following question.

"But the fact is, that we already hear it whispered in the private circles of those who oppose the new Constitution, that the thirteen States are of too great extent for any general system, and that we must of necessity resort to separate confederacies of distinct portions of the whole."

Identify the sentence type.

A. It is a compound sentence.
B. It is a complex sentence.
C. It is a compound-complex sentence.
D. It is a simple sentence.