Quote:
During holidays, people tend to save calories by not eating until the big meal in the afternoon, but current research suggests that people who wait to eat consume
as much as 30 percent more calories than people who maintain normal eating patterns during the day of the meal.
Quick read-through reveals that we have a sentence that tests two things: (1) much vs many and (2) comparison between the two groups of people. Clearly, calories can be counted, so we need to use "many". Let's look at the answer choices and eliminate erroneous options.
A. as much as 30 percent more calories than people who maintain normal eating patterns during the day of
We need "many". Out for the reason discussed above.
B. as many as 30 percent more calories as people who maintain normal eating patterns on the day of
Keep.
C. more calories, as much as 30 percent, than people who maintain normal eating patterns during
We need "many". Out for the reason discussed above.
D. as many as 30 percent more calories than people who maintain normal eating patterns the day of
Keep.
E. as much as 30 percent more calories as people with normal eating patterns the day of
We need "many". Out for the reason discussed above.
The difference between option (B) and (D) is subtle. We have a preposition "on" in (B). Also, we have "as" in (B) vs "than" in (D). Let's look at what is compared. Group B (who waits) eats as many as 30 percent more calories as opposed to group A that eats normally.
So, usage of "than" in (D) is ambiguous.
Group B eats more calories than people ??

OR
Group B eats more calories than people in group A do?
Option (B) is the winner.