Manufacturing output in the U.S. continues to increase. The high unemployment of skilled workers who previously worked in the manufacturing sector _______________________. A. is the result of untrained laborers.B. is strictly a factor of U.S. manufacturing companies outsourcing the majority of their work.C. can be reconciled by the fact that manufacturing is very efficient and requires fewer workers to produce the same amount, or even more output.D. can be attributed to manufacturing going green.