Gmatbattle wrote:
Birds need so much food energy to maintain their body temperatures that some of them spend most of their time eating. But a comparison of Mifune, a bird of a seed-eating species, to Rossi, a bird of a nectar-eating species that has the same overall energy requirement, would surely show that Mifune spends more time eating than does Rossi, since a given amount of nectar provides more energy than does the same amount of seeds.
The argument relies on which one of the following questionable assumptions?
(A) Birds of different species generally do not have the same overall energy requirements as each other.
(B) The nectar-eating bird does not sometimes also eat seeds.
(C) The time it takes for the nectar-eating bird to eat a given amount of nectar is not longer than the time it takes the seed-eating bird to eat the same amount of seeds.
(D) The seed-eating bird does not have a lower body temperature than does the nectar-eating bird.
(E) The overall energy requirements of a given bird do not depend on factors such as the size of the bird, its nest-building habits, and the climate of the region in which it lives.
Isn't option (C) a restatement of the conclusion "
would surely show that Mifune spends more time eating than does Rossi" ?
From what I have learned assumption question doesn't have any repeated statement of the premise.
As option (D) inserts a new information, option D seems to be a better choice.
But the problem with option D is that we do not know the rate of raise in body temperature to the energy intake.
I still can not convince myself about the option C, as the same is already being said in the conclusion. Assumption can not be a restatement of the conclusion.
Can some one take some time to decipher this ?