Suppose That the Cells of Seed Plants, Like the Cells

Suppose that the cells of seed plants, like the cells of human skin, produce a pigment upon increased exposure to ultraviolet radiation. Rank the following cells, from greatest to least, in terms of the likelihood of producing this pigment.

A) epidermal cells of sporophyte megaphylls, cells of a gametophyte, cells of a megasporangium, cells in the interior of a subterranean root
B) epidermal cells of sporophyte megaphylls, cells of a gametophyte, cells in the interior of a subterranean root, cells of a megasporangium
C) epidermal cells of sporophyte megaphylls, cells of a megasporangium, cells of a gametophyte, cells in the interior of a subterranean root
D) epidermal cells of sporophyte megaphylls, cells in the interior of a subterranean root, cells of a megasporangium, cells of a gametophyte