Papabear Corporation Is a Single Seller of Wonderstuff, but There

Multiple Choice

Papabear Corporation is a single seller of Wonderstuff, but there are two substitutes for Wonderstuff. Given this situation, Papabear

A) cannot be a monopoly because there are substitutes for Wonderstuff.
B) cannot be a monopoly because two substitutes make it a competitive market.
C) can still be a monopoly because it is unknown if the two substitutes are close substitutes.
D) acts as if it were competitive and takes the price set in the market.