Afarmer in an early civilization grows a crop surplus and shares it with his neighbors. which of the following events must have occurred before this scenario could happen?

d

explanation:

i think that this is the best answer, but im sorry if this is wrong

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.