怎麼又是這種問題阿

dinino66328

question 39.
Birds' feathers appear to have evolved from dinosaur scales well over 100 million years ago,
A) Chinese scientists have shown, based on a fossil bird found in the Yixian mountains of northern China.
B) Chinese scientists have shown a fossil bird found in the Yixian mountains of northern China.
C) Chinese scientists showed, based on a fossil bird found in the Yixian mountains of northern China.
D) when the Chinese scientists found a fossil bird in the Yixian mountains of northern China.
E) which the Chinese scientists say can be proven from a fossil bird which they found in the Yixian mountains of northern China.
The answer is A
但是我覺得A有點問題，首先是雙動詞的問題，兩個子句之間沒有連接詞。再來， based on a fossil bird found in the Yixian mountains of northern China，和哪一句有關阿?
版主大人可以幫忙嗎?

dinino66328

有那位可以幫小弟一把的，感激不盡