First i went to the wrong classroom for math what purpose does this senetce serve in the paragraph ?

c is a symbol. when bernice gets her hair cut, it is the authors way of showing the affects and demands of pier pressure and the over-all attitudes of people at the time.

recent brain research has shown some surprising benefits as a result of formal musical training. learning to play a musical instrument appears to develop parts of the brain that can even influence academic results. the studies indicate that the earlier a child begins training, the more benefits there are. one such study showed that children who began musical studies before the age of seven had a more developed brain in the region where language production and auditory processing take place. scientists believe there is mounting evidence to show that early musical training can improve brain function.

explanation:

it would be d because the however is more proper and the comma is placed in the right spot