the computer or computers / about or without about
which one is correct,whether(1) ,(2),(3) or 4) please explain.
(1)On the other hand,the computer may bring about some negative change.
(2)(1)On the other hand,Computers may bring about some negative change.
(3)On the other hand,the computer may bring some negative change.
(4)On the other hand,computers may bring some negative change.