![](https://lstatic.shangxueba.com/jiandati/pc/images/pc_jdt_tittleico.png)
The author mentions specific effects that auxin has on plant development in order to illus
A.point that some of the effects of plant hormones can be harmful
B.way in which hormones are produced by plants
C.hierarchical nature of the functioning of plant hormones
D.differences among the best-known plant hormones
E.concept of pleiotropy as it is exhibited by plant hormones
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)