A agrees to buy from B a certain horse. It turns out that the horse was dead at the time of the bargain though neither party was aware of the fact the agreement is______________?

A agrees to buy from B a certain horse. It turns out that the horse was dead at the time of the bargain though neither party was aware of the fact the agreement is______________?

A. Valid
B. Void
C. Voidable
D. Both (a) and (b)