Generally,only One Sperm Fertilizes an Egg Because

Multiple Choice

Generally,only one sperm fertilizes an egg because

A) there are so few sperm that two are unlikely to arrive at the same time.
B) sperm compete and only the most fit one is accepted.
C) many sperm enter but only one set of chromosomes fuses with the egg nucleus; excess sperm are absorbed.
D) when the first sperm membrane fuses with the egg membrane, it separates the fertilization membrane and forms a barrier to other sperm.