一道SAT改错题

问题描述:

一道SAT改错题
Among the most widespread of marine animals,
A B
starfish and sea urchins inhabit all seas
C
except that of the polar regions.No error
D E
谁做了每日一题,或者很确定的,THANKS A LOT:)
貌似ABCD标的不对。那就说有错没,有错的话是哪儿?:)

D except that of
The error in this sentence occurs at (D),where there is improper pronoun use.The plural pronoun “those” should be used to refer to the plural noun “seas.”