Which Statement About Roots and Mycorrhizae Is True

Which statement about roots and mycorrhizae is true?

A) Most land plants today take up water only through their roots.
B) Mycorrhizae are very good at absorption because they provide large amounts of surface area.
C) The ability of roots to take up water increases with thickness because thicker roots develop a water-resistant waxy coating.
D) Mycorrhizae allow less exploration of the soil for water and nutrients.