Which best describes the alternation of generations?

A) Fertilization produces haploid spores.

B) Meiosis produces a diploid zygote.

C) A gametophyte is a diploid phase.

D) A gametophyte is a haploid phase.

Answer;

D) A gametophyte is a haploid phase.

Explanation;

The gametophyte produce eggs and sperm, which are haploids, that join and lead to the development of a diploid sporophyte.

Diploid means that a cell has two set o chromosomes, while a haploid cells have only one set of chromosomes.

Sporophytes which are diploid undergo meiosis to yield haploid spores, then the spores grow into gametophytes (haploid).

Gametophytes undergoes mitosis to yield gametes (eggs and sperms), the gametes then join to form a diploid zygote that then grows to sporophytes.