The volume of Lake Superior, the largest lake in North America, is less than half of Lake Baikal.
(A) is less than half of Lake Baikal
(B) is less than half that of Lake Baikal
(C) is less than half as compared to Lake Baikal
(D) has less than half what Lake Baikal has
(E) has less than half as compared to what Lake Baikal has

Anyone with detailed explanation on why option E is wrong and what is the correct option.?