Recently, economists conducted an experiment that awarded teachers merit pay if their students' test results improved. The results showed that teachers didn't just teach to the test but also provided students with skills that will serve them well later in life. What can you learn from this experiment? Merit pay was ________ because ________. A. an incentive for students; students want teachers' incomes to increase B. not an effective incentive for teachers; they did not concentrate on teaching to the test C. an effective incentive for teachers; students acquired skills beyond what was needed to increase test scores D. a bonus for teachers; teachers earned higher incomes