GmatKiss wrote:Tektites, which may have been propelled to Earth from lunar volcanoes, are much like the volcanic glass obsidian, but their chemical composition is different than any terrestrial lava; they contain far less water than obsidian does and none of its characteristic microcrystals.
(A) is different than any terrestrial lava; they contain
(B) is different than any terrestrial lava's, containing
(C) is different from that of any terrestrial lava; they contain
(D) differs from any terrestrial lava in containing
(E) differs from that of any terrestrial lava's, containing
A and D incorrectly compare
chemical composition to
lava. When a sentence makes a comparison, it must compare APPLES to APPLES. Eliminate A and D.
COMMA + VERBing generally refers to the subject of the preceding clause. Thus, in B and E,
containing refers to
composition, implying that the COMPOSITION is
containing far less water than obsidian. The
composition itself does not CONTAIN far less water; the TEKTITES do. It is illogical to compare
composition to
obsidian. Eliminate B and E.
The correct answer is
C.
Other errors:
In A and B,
different THAN is incorrect. To convey that X and Y are different, we say that
X is different FROM Y.
In E,
that OF and
lava'S are redundant. Eliminate E.
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