The Slave Onesimus,given to the Illustrious Colonial Clergymen Cotton Mather,is

The slave Onesimus,given to the illustrious colonial clergymen Cotton Mather,is most notable for what accomplishment?

A) He introduced Mather to the process of inoculation for smallpox.
B) Under Mather's tutelage,he became the first black slave to convert to Christianity.
C) He introduced Mather to African call-and-response techniques which Mather popularized within the Puritan church.
D) He introduced Mather to rice-cultivating techniques which made his master a rich man and which introduced a new cash crop to North America.