What is a 20meter maple tree A a gametophyte B haploid C end

What is a 20-meter maple tree? A. a gametophyte B. haploid C. endosperm D. a sporophyte

Maple tree is an example of a sporophyte

A sporophyte is a multicellular diploid generation which produce haploid spores. An Oak tree, maple tree are examples of sporophytes