The single family house constructed by the Yana, a Native American people who lived in what is now northern California, was conical in shape, its framework of poles overlaid with slabs of bark, either cedar or pine, and
banked with dirt to a height of three to four feet.This question highlights two very important things to succeed in SC.
First is the identification of the "subject" and "object" of the sentence.
Second is the slash and burn technique to remove extra useless information to achieve the barest composition of the sentence.
Lets apply these two criterion here :-
The single family house constructed by the Yana ,a Native American people who lived in what is now northern California, was conical in shape, its framework of poles overlaid with slabs of bark, either cedar or pine, and banked with dirt to a height of three to four feet.The new sentence becomes:-
The single family house constructed by the Yana was banked with dirt to a height of 3 to 4 feet.The subject of the sentence is "HOUSE" and the original sentence is already correct and perfect.
WE DO NOT NEED ANY MODIFICATION IN THE ORIGINAL SENTENCE, THUS A IS THE CORRECT ANSWER
A IS THE CORRECT ANSWER GMATBLACKBELT
The single-family house constructed by the Yana, a Native American people who lived in what is now northern California, was conical in shape, its framework of poles overlaid with slabs of bark, either cedar or pine, and
banked with dirt to a height of three to four feet.
A. banked with dirt to a height of
B. banked with dirt as high as that of
C. banked them with dirt to a height of
D. was banked with dirt as high as
E. was banked with dirt as high as that of