In paragraph 4, the phrase “…their big investments will come at the expense of being rare…” most likely refers to which of the following? A) Unfort...

In paragraph 4, the phrase “…their big investments will come at the expense of being rare…” most likely refers to which of the following?
A) Unfortunately, because two large gametes would spend so much effort in trying to unite, much of their genetic material would be wasted.
B) On rare occasions, the union of two large gametes produces healthier offspring than does the union of two small gametes.
C) Although it is harder for two large gametes to unite than it is for two small gametes to unite, the offspring are healthier.
D) Because of their size and genetic content, two large gametes will have to make a relatively greater effort in order to form a union.
E) Although the size of two large gametes would allow the fusion of good and plentiful genetic material, it would also make such a fusion harder to achieve.