Answer:
D. Both b. and c
Explanation:
The contract between Dr. Reilly and Pharzime can either be output contract or considered to be void, since there are not agreement on quantity of products.
An output contract is an agreement in which a producer agrees to sell his or her entire production to the buyer, who in turn agrees to purchase the entire output. This might be the case with Dr. Reilly and Pharzime, or the contract might be considered void.