Refer to the Following

Multiple Choice

Refer to the following:
"At Huffy's ... bicycle factory, 1,700 employees turn out 15,000 bicycles a day (in 1987) . Five years ago, it required 2,200 workers to make 10,000 bikes daily." (The Wall Street Journal) .
-Holding all else equal, we can conclude that, over the past five years,

A) Huffy's average variable cost decreased.
B) Huffy's average variable cost increased.
C) Huffy's marginal cost decreased.
D) Huffy's marginal cost increased.
E) both a and c