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According to paragraph 2, an example of Psittacosaurus featuredA.pointed upper and lower j
According to paragraph 2, an example of Psittacosaurus featured
A.pointed upper and lower jaws.
B.long quills.
C.mating and fighting skills.
D.defensive horns.
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)