你认为哪一句是准确的？请说明理由

此题为汉译英题。
中文：老科学家、中年科学家很重要，青年科学家也很重要。
以上四句哪一句为表达最为准确的？？理由是什么？？？

投票项目 ( 单选 ) 参与人数 32  

 

1.  The veteran and middle-aged scientists are important, and so are the young ones.
2.  The veteran , middle-aged scientists are important, and so are the young ones.
3.  The veteran and middle-aged scientists are important, so are the young ones.
4.  The veteran, middle-aged scientists are important, so are the young ones.