Spores and Gametes Are Both Haploid Reproductive Cells

Spores and gametes are both haploid reproductive cells. What is the difference between the two?

A) Gametes germinate and grow into a multicellular haploid gametophyte, and spores carry out fertilization.
B) Spores germinate and grow into a multicellular haploid gametophyte, and gametes fuse to form a diploid zygote.
C) Spores are found only in plants that reproduce asexually, and gametes are found only in plants that reproduce sexually.
D) Spores fuse to form a diploid zygote that eventually becomes the sporophyte, gametes.