Answer:
A) They helped create the United States government.
Explanation of why the other options are incorrect:
B) They wrote the Declaration of Independence: While Benjamin Franklin was a member of the committee that drafted the Declaration of Independence, he was not the sole author. The primary author of the Declaration of Independence was Thomas Jefferson, with significant contributions from other members of the Continental Congress.
C) They helped settle the area known as the Plymouth Colony: While the Pilgrims, who settled the Plymouth Colony, are also considered important figures in American history, they lived more than a century before George Washington, John Adams, and Benjamin Franklin were born.
D) They fought in the Continental Army against the British: While George Washington was the commander-in-chief of the Continental Army during the American Revolution, John Adams and Benjamin Franklin were not known for their military service. Instead, they played important roles in diplomatic efforts and the establishment of the United States government.