I think that 1st is B and the 2nd is A
Answer:
The second one: You are, if I'm not mistaken, a good person for this experiment.
Explanation:
The first sentence, "You are, if I'm not mistaken a good person, for this experiment." does not have a comma after "mistaken", where there should be one. After "a good person", there should not be a comma.
Many believe music doesn't belong in the school system. However, music increase activity in student's brains and are shown to be beneficial and needed for brain growth.
