Demand in Factor Markets Differs from Demand in Product Markets

Demand in factor markets differs from demand in product markets in that

A) the demand for a factor of production is difficult to determine.
B) the demand for a factor of production is influenced by workers' productivity and by the producers' expected sales revenues, not by tastes and preferences of consumers.
C) demand for a factor of production is based on the tastes and preferences of firms.
D) demand for a factor of production is based on the tastes and preferences of resource owners.