请教一道Pr，质疑此答案

guanjusishui

123. (30997-!-item-!-188;#058&004357)
According to two teams of paleontologists, recent fossil discoveries in Pakistan show that whales,  porpoises, and dolphins are more closely related to some of the oldest known even-toed ungulates—
a group of hoofed mammals that today includes cows, camels, pigs, and hippos--than to any other mammals.

(A) that whales, porpoises, and dolphins are more closely related to some of the oldest known


even-toed ungulates--a group of hoofed mammals that today includes cows, camels, pigs, and
hippos--than
(B) that whales, porpoises, and dolphins are more closely related to some of the oldest known
even-toed ungulates--a group of hoofed mammals that today include cows, camels, pigs, and
hippos--as
(C) whales, porpoises, and dolphins to be more closely related to some of the oldest known
even-toed ungulates--a group of hoofed mammals that today include cows, camels, pigs, and
hippos--than they are
(D) whales, porpoises, and dolphins as being more closely related to some of the oldest known
even-toed ungulates--a group of hoofed mammals that today includes cows, camels, pigs, and
hippos--as they are
(E) whales, porpoises, and dolphins as more closely related to some of the oldest known even-toed
ungulates--a group of hoofed mammals that today include cows, camels, pigs, and hippos--than

排除后选A，A选项中的includes是怎么回事儿，一个是include吧，是不是印错了

guanjusishui

这include修饰的不是mammals么，还是a group of malmmals

小伊YSY

像 a body of , a collection of, an array of, aseries of ,a set of, a portion of, 和 a group of这样的表示集合类的词，后面要加名词复数，但谓语要用单数

LZ就把它当作习惯用法吧～啊，不过话说就是习惯用法的样子～

fengshou

includes修饰前面的a group
of hoofed mammals是介词短语 可以不看。