Anisogamy (different-size gametes) is a phenomenon found in many sexually reproducing species. which of the following assumptions might contribute to the notion that natural selection favors anisogamy? group of answer choices a) the probability that a zygote survives increases with its size, and the size of the zygote is a function of the sizes of the fusing gametes. b) there is a trade-off between the size of gametes and the number of gametes. c) the larger the gamete, the less mobile it is. d) all options are correct