If we remove the fluffs,then the sentence would look like this:X( gene flaws) are relative newcomers to Y( medical terminology),as are a majority of the Zs (new anti-tumor drugs), still in early testing, that are aimed at them.
This sentence look alright.B and D are out because X and Y should be compared withas instead oflike .
C is wrong because of the wrong construction.Its look like "aimed at them" is modifying testing.
E is wrong because and should be followed by an independent
...
This sentence look alright.B and D are out because X and Y should be compared withas instead oflike .
C is wrong because of the wrong construction.Its look like "aimed at them" is modifying testing.
E is wrong because and should be followed by an independent
...
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