Which of the Following Claims About Moss Gametophytes Is Most

Which of the following claims about moss gametophytes is most consistent with the observation that they lack a cuticle and are 1-2 cells thick?

A) They use stomata for gas exchange regulation.
B) They can easily lose water to, and absorb water from, the atmosphere.
C) Photosynthesis occurs throughout the entire gametophyte surface.
D) They have branching veins in their leaves.