How was a town able to become independent of a feudal lord ?

When merchants became richer due to increased trade fostered by town life, they started to negotiate with their lords for the payment of a fixed amount (as opposed to a cut of their profits) to be paid annualy to the lord, thus gaining independence to govern themselves.

i discarded the supernatant and kept the pellet in this part of the experiment because you have to return all unused chemicals into their original containers at the end of each labratory.

explanation:

i think the answer is a and i hope this ; ))