Sentence Correction

Even in this age of conservation, cooking ranges that consume fossil fuels are far more common than those that rely on magnetic resonance, producing heat more efficiently than natural gas.

a. producing heat more efficiently than natural gas
b. producing heat more efficiently than natural gas does
c. which produce heat more efficiently than natural gas
d. which produce heat more efficiently than natural gas does
e. much more efficient at producing heat than natural gas

OA B

I picked D

sk8ternite wrote:Even in this age of conservation, cooking ranges that consume fossil fuels are far more common than those that rely on magnetic resonance, producing heat more efficiently than natural gas.

a. producing heat more efficiently than natural gas
b. producing heat more efficiently than natural gas does
c. which produce heat more efficiently than natural gas
d. which produce heat more efficiently than natural gas does
e. much more efficient at producing heat than natural gas

OA B

I picked D

Here which can not be used because "which" modifies magnetic resource which is incorrect. We are left with A, B and E. A and E are incorrect due to parallelism. Both are comparing efficiency with natural gas. B is correct as it compares efficience of fossil fuels with efficiency of natural gas.

riteshbindal wrote:

sk8ternite wrote:Even in this age of conservation, cooking ranges that consume fossil fuels are far more common than those that rely on magnetic resonance, producing heat more efficiently than natural gas.

a. producing heat more efficiently than natural gas
b. producing heat more efficiently than natural gas does
c. which produce heat more efficiently than natural gas
d. which produce heat more efficiently than natural gas does
e. much more efficient at producing heat than natural gas

OA B

I picked D

Here which can not be used because "which" modifies magnetic resource which is incorrect. We are left with A, B and E. A and E are incorrect due to parallelism. Both are comparing efficiency with natural gas. B is correct as it compares efficience of fossil fuels with efficiency of natural gas.

But "which" modifies those that rely on magnetic resonance. Its the cooking ranges that rely on magnetic resonance which produce heat more efficiently than natural gas does. The explanation for this answer from the princeton review says "which" is ambigious.

See, that is why it is ambiguous. You are thinking that it is modifying those that rely on magnetic resources and I am thinking that it is modifying magnetic resources So princeton is correct in saying that "which" is ambigous