Please Use the Following Information to Answer the Question(s) Below

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
-Which of the following is an example of alternation of generations?

A) A diploid plant (sporophyte) produces, by meiosis, a spore that gives rise to a multicellular, haploid pollen grain (gametophyte) .
B) A diploid animal produces gametes by meiosis, and the gametes undergo fertilization to produce a diploid zygote.
C) A haploid mushroom produces gametes by mitosis, and the gametes undergo fertilization, which is immediately followed by meiosis.
D) A diploid cell divides by mitosis to produce two diploid daughter cells, which then fuse to produce a tetraploid cell.