After a glacier starts melting, the melted ice uncovers lifeless rock and gravel.
Which statement describes what usually happens next?
A. Shrubs that need direct sunlight begin to grow among the
grasses.
B. Bacteria on roots of seed plants use nitrogen from the air to make
nutrients.
C. Lichens begin to grow on the bare rock and cause it to break
down.
D. Grasses begin to grow in the rocky soil and add organic matter to