Which of the following is an example of a medieval guild?
a.) monks who made agreements to provide an education to townspeople in exchange for food and shelter

b.) merchants with common trade interests who joined together and formed associations for their mutual benefit

c.) peddlers who traveled as a group to the same area to sell merchandise together rather than compete with each other

d.)vassals who united to pay taxes to their feudal lords with money, as well as crops and goods from their estates