Answer:
Option B, Quakers in Philadelphia, is the right answer.
Step-by-step explanation:
In the history of reforms, one of the most significant groups was the Quakers. The members of this organization played a vital role in the emancipation of slavery, equal rights for women etc.
This organization became the first organization to outlaw slave-holding. It was due to the efforts of the Quakers that Ben Franklin and Thomas Jefferson influenced the Continental Congress to outlaw the import of slaves into the territories of the U.S. as of 1st December 1775.