<p>1) (The oral tradition of the Anasazi Native Americans, often more elaborate and colorful than the Inuit Native Americans), has been collected by historians and compiled in scholarly publications.
( ) is underlined part.</p>
<p>(A) The oral tradition of the Anasazi Native Americans, often more elaborate and colorful than the Inuit Native Americans
(B) The oral tradition of Anasazi Native Americans, which are often more elaborate and colorful than the Inuit Native Americans
(C) Anasazi Native Americans oral tradition, often more elaborate and colorful than that of the Inuit Native Americans
(D) The oral tradition of the Anasazi Native Americans, often more elaborate and colorful than those of the Inuit Native Americans
(E) Often being more elaborate and colorful than the Inuit Native Americans, the oral tradition of the Anasazi Native Americans</p>
<p>This question is faulty comparison. However, I'm not sure whether the answer is C or D.
"The tradition" is singular, so we may use "that of" instead of "those of", right?
But someone says answer "D".</p>
<p>2)
(Before becoming essential for their ability) to keep one in touch with friends, Facebook was not regarded a noteworthy networking website. </p>
<p>(A) Before becoming essential for their ability
(B) Up until it becoming popular for its ability
(C) Before having become popular for their ability
(D) Before it becoming popular for its ability
(E) Before it became popular for its ability </p>
<p>What is the answer?
"Facebook" is singular, so we may use "its" instead of "their".</p>