In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: Gametes then unite in fertilization and form a diploid zygote., Fact2: After the mating of gametes, zygots are formed., Question: What do gametes mate into? (A) haploid (B) fertile (C) pollen (D) seeds (E) zygotes (F) eggs (G) chromosomes (H) offspring
E