<p>Because he
A
adhered to an extremely high standard of moral principles,
rather than
B
the conventional wisdom of his time, the revolutionary
drew comparisons
C
to
values of old
D
.
No error.
E</p>
<p>Why is the answer D(values of old)? Is it just because it sounds weird and doesn't make sense?</p>
<p>If “values of old” were an idiom then it may be an acceptable usage. But it isn’t. “old” in the context used is an adjective, so a noun needs to follow. What could work is “values of former times”, or something similar.</p>
<p>Thanks fogcity!</p>
<p>Do you happen to know this one</p>
<p>Scientists
have demonstrated
A
that the coloration of certain birds’ feathers
serves
B
an
interesting
C
varied
group
D
of purposes.
No error.
E</p>
<p>Why is it C?</p>
<p>interestingly varied group of purposes</p>
<p>Sometimes
in
A
politics, twisting the truth and embellishing information
while still making
B
unassailably factual statements
C
are
D
a true talent.
No error.
E</p>
<p>Why is it D? Aren’t twisting and embellishing two things? So are should be correct? by the way thanks for the help!</p>
<p>“Twisting the truth and embellishing information while still making unassailably factual statements” is singular (the whole statement is one talent) and therefore takes “is.”</p>