Bryophytes Are Widely Distributed Geographically, but Vascular Plants Account for Most

Bryophytes are widely distributed geographically, but vascular plants account for most terrestrial photosynthesis. Why?

A) Bryophyte photosynthesis depends on surface water.
B) Vascular plants can maintain the hydration of photosynthetic cells using deep soil water.
C) Vascular plants are larger CO₂ sinks than bryophytes.