In order to conserve the energy and heat they need to spend the entire winter sitting motionless over incubating eggs, male emperor penguins huddle over the nests in groups,
thereby reducing the rate at which they burn energy so that it is 25 percent lower than it would be for isolated birds.
A)thereby reducing the rate at which they burn energy so that it is 25 percent lower than it would be for
B)thereby reducing their rate of burning energy until it is 25 percent lower when compared with
C)and they thereby reduce by 25 percent the rate they burn energy, as compared to what it would be with
D)which thereby reduces by 25 percent their rate of burning energy, when comparing them to
E)which thereby reduces the rate they burn energy so that it is 25 percent lower than
Lets eliminate to get closer to the correct answer. My thought process would be something like -
To conserve something and something.. penguins huddle in groups....(incomplete) -->
I see these patterns -
reduce, reducing, than, compare
Now to minimize time its better to look at those options first which have a higher probability of being correct. Once we feel that its right, we'll try to find errors in other options to support our choice.
A B C D E than is better than using compare. A and E have it. In E which points to groups. Strike off E. A looks fine.
Keep A.A B C D E We are left with B, C and D. Compared to is wrong idiom here. Compared with is correct.
Remember, we use
compare with for similar things and
compare to for unlike things.
C and D are off the ring. C is a disaster if spend some more reading it.
A B C D E Best choices A and B so far. Usage of than is better than compare. Its more concise. Probability of A being correct answer looks higher. Select the option A, and read B again before confirming.
Wait a min, B is comparing apples to oranges. burnt energy 25% lower than isolated birds?
A is the winner! A B C D E +Kudos if this helped!!