题目内容
(请给出正确答案)
[单选题]
老科学家、中年科学家很重要,青年科学家也很重要。
A.The veteran and middle-aged scientists are important, and so are the young ones.
B.The veteran, middle-aged scientists are important, and so are the young ones.
C.The veteran and middle-aged scientists are important, so are the young ones.
D.The veteran, middle-aged scientists are important, so are the young ones.
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