Why Is It Necessary for Many Sperm to Be Present

Why is it necessary for many sperm to be present in order for one to fertilize the egg?

A) A sperm cannot find the egg by itself.
B) The combined enzymes digest a path through the corona radiata and zona pellucida.
C) The combined motion of their flagella enables one sperm to push into the egg.
D) A mass of sperm is necessary to open the uterine tube.
E) The area is so large that only one sperm can find the egg.

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