![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
What does the author compare grammar and vocabulary to?
A.
He compares grammar to a well-conditioned car and vocabulary to a road map.
B.
He compares grammar to a tall tree and vocabulary to beautiful flowers.
C.
He compares grammar to a road map and vocabulary to a well-conditioned car .
D.
He compares grammar to beautiful flowers and vocabulary to a tall tree.