Both men believed that the Catholic Church should end the sale of indulgences. Option C is correct.
An indulgence is a pardon for certain types of sin. The Catholic Church sold indulgences in the late medieval period, and their sale motivated Martin Luther to present his "95 Theses, "which was a document created in 1517 to attack the Catholic Church’s corrupt practice of selling “indulgences” to absolve sin.
After his appointment as Commander-in-Chief in Philadelphia, Washington traveled to Cambridge, Massachusetts to take command of the newly formed Continental Army positioned around Boston