![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
By citing the surgeon general's statement, the author intends to explain______.
A.
why smoking outdoors should be banned
B.
that outdoor exposure causes substantial health damage
C.
that the argument of outdoor-smoking-ban advocates is not solid
D.
how the outdoor smoking ban in fact increases smoking exposure