John is selling his house to Paul. John knows his house is located in a flood hazard zone but does not disclose the fact to Paul because he knows Paul will not buy the house if he knows it is in a flood zone. John has interfered with the fulfillment of the contract by

a. committing fraud.
b. being negligent.
c. innocently misrepresenting a material fact.
d. failing to carry out a duty.

Ans: a. committing fraud.