Recall the Economics in Practice on Page 370: According to a Study

Recall the Economics in Practice on page 370: According to a study discussed in the Economics in Practice, when students were moved from a class taught by a below-average teacher to one at the 75th percentile, the move

A) made no difference on the students' future annual earnings.
B) increased the students' future earnings by 3.5% per year.
C) increased the students' future earnings by more than 50% per year.
D) actually decreased the students' future annual earnings.