If Lignin-Containing Cell Walls Had Not Evolved in Land Plants,we

If lignin-containing cell walls had not evolved in land plants,we might now be seeing

A) fields of tall plants that lack stomata but have rhizoids.
B) forests of tall animals instead of tall plants on the planet.
C) plants that grow underground instead of growing tall.
D) the same plant communities that we have now,because they still have cellulose walls.
E) land areas of the planet covered with mats of low-lying plants and no trees.