The world's first antislavery society was founded by a. Thomas Jefferson b. Quakers in Philadelphia c. Puritans in New England d. Catholics in Maryland

Option B, Quakers in Philadelphia, is the right answer.

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.