Since the Demand for a Narrowly Defined Product Class (Fords

Since the demand for a narrowly defined product class (Fords, for example) is more elastic than the demand for a broadly defined product class (all automobiles) , a union will be better able to raise the wages of its members without causing a reduction in their employment when

A) it can organize an entire industry, rather than just selective firms within the industry.
B) it concentrates its organizational efforts on a single firm, ignoring the rest of the industry.
C) the demand for the product is highly elastic.
D) there are many good substitutes for union labor.