One of the Main Differences Between the Settlement Movement and Charity

One of the main differences between the settlement movement and Charity Organization Societies (COSs) was:

A) COSs were developed in the 19th century and settlement houses in the 20th century.
B) COSs provided trained licensed therapists, settlement houses provided volunteers.
C) COSs had volunteers that would enter poor districts and offer aid while the settlement movement had volunteers who would live with the poor.
D) COSs provided counseling; the settlement movement provided monetary aid.