I feel C simply is not right.
(C) There are proportionally more left-handers among
people whose ability to reason mathematically
is above average than there are among people
with poor mathematical reasoning ability.
what this sentence means is: among"people whose ability to reason mathematically is above average"(group A ), "there are proportionately moreleft-handers"(subgroup I ) than right-handers(subgroup II ). say, we have 100 hundred in group A, can we say subgroup
...
(C) There are proportionally more left-handers among
people whose ability to reason mathematically
is above average than there are among people
with poor mathematical reasoning ability.
what this sentence means is: among"people whose ability to reason mathematically is above average"(group A ), "there are proportionately moreleft-handers"(subgroup I ) than right-handers(subgroup II ). say, we have 100 hundred in group A, can we say subgroup
...
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