经济学原理,急,为什么不选E1.Leather and beef are jointly produced such t

经济学原理,急,为什么不选E
1.
Leather and beef are jointly produced such that an increase
in the production of one results in an equal increase in the production of the
other.An increase in the demand for leather will most likely cause
A.
A decrease in the price of leather
B.
A decrease in the price of beer
C.
A decrease in the equilibrium quantity of beef sold
D.
An increase in the demand for beef in the short-run
E.
An increase in the supply of leather