(A) of four babies are now born to mothers aged thirty years or more, compared with just one of six born
(B) of four babies is now born to a mother whose age is thirty or older, compared to just one of six babies who were born
(C) baby in four are now born to mothers aged thirty or older, compared to just one in six
(D) baby in four is now born to a mother aged thirty or older, compared with just one in six
(E) baby in four is now born to mothers aged thirty years or more, compared to just one in six
請問B哪裡錯了呢? 蠻對稱的阿...
