![](https://lstatic.shangxueba.com/sxbzda/h5/images/m_q_title.png)
Why does the author call lichens pioneers?A.Because they developed so early in the history
Why does the author call lichens pioneers?
A.Because they developed so early in the history of the planet.
B.Because of their primitive structure.
C.Because they prepare soil for other plants.
D.Because they were the first plants to live in Antarctica .
![](https://lstatic.shangxueba.com/sxbzda/h5/images/tips_org.png)