大全 section c 24

applemusic

The endurance and consistency of baseball star Lou Gehrig, known as “The Iron Horse,” are legendary.

(A) The endurance and consistency of baseball star Lou Gehrig, known as “The Iron Horse,” are legendary.
(B) The endurance and consistency of Lou Gehrig, a baseball star know as “The Iron Horse,” is legendary.
(C) Known as “The Iron Horse,” the endurance and consistency of Lou Gehrig, the baseball star, is legendary.
(D) The reason baseball star Lou Gehrig is known as “The Iron Horse” is because of his legendary endurance and consistency.
(E) Known as “The Iron Horse,” baseball star Lou Gehrig’s endurance and consistency are legendary.
答案是1，为什么不是4呢

bigcamel

reason...because...是典型的gmat错误。用词累赘

Allen

D changes the original meaning.
It seems, in D, it is  his endurance and consistency that makes the guy as iron horse. but A doesn't mean that, it simply states his endurance and consistency are legendary.