If Identical Workers Are Paid an Extra $1 Per Hour

Multiple Choice

If identical workers are paid an extra $1 per hour to work the night shift,then one can conclude that:

A) workers who work the day shift should also be paid an extra $1.
B) the night shift is intrinsically more attractive to all workers.
C) the value of working the day shift is at least $1 per hour to some workers.
D) the marginal product of night shift workers is higher than the day shift workers.