While all states face similar industrial waste problems, the predominating industries and the regulatory environment of the states obviously determines the types and amounts of waste produced, as well as the cost of disposal.
(A)all states face similar industrial waste problems, the predominating industries and the regulatory environment of the states obviously determines
(B)each states faces a similar industrial waste problem, their predominant industries and regulatory environment obviously determine
(C)all states face a similar industrial waste problem; their predominating industries and regulatory environment obviously determines
(D)each state faces similar industrial waste problems, the predominant industries and the regulatory environment of each state obviously determines
(E)all states face similar industrial waste problems, the predominant industries and the regulatory environment of each stat obviously determine
ANS:E
想請教大家的是,在OG解釋裡面B跟D都有一句「Each state must be compared to all other states」
他這一句話到底是在講哪一個部份阿?