Which of the following best represents the pricing behavior of firms in a monopolistically competitive industry?

a. Unykdrugs, Inc. produces where its marginal revenue is equal to its marginal cost and prices on its downward-sloping demand curve such that the market for its product clears knowing it will not face competition due to patents it holds on its products.
b. Stay*Put Clothespins takes the market price of clothespins as given and produces the amount of clothespins where marginal revenue equals marginal cost.
c. Looking Over Your Shoulder Handbag Co. chooses the price it charges by estimating what its rivals are most likely to do and then taking their responses into consideration.
d. Teen Angle Hardware looks for a niche to sell its hardware products to teens but finds it difficult to earn anything more than normal profits due to other hardware stores also looking for niches.