The author mentions that all of the following are aware of quantities

Đáp án C
Thông tin ở đoạn đầu tiên:
It has also been noted by naturalists that a certain type of wasp always provides five – never four, never six - caterpillars for each of their eggs so that their young have something to eat when the eggs hatchResearch has also shown that both mice and pigeons can be taught to distinguish between odd and even numbers of food pieces the naturalist Gilbert White tells how he surreptitiously removed one egg a day from a plover‟s nest , and how the mother laid another egg each day to make up for the missing one
Chỉ có caterpillars (sâu bướm) là không được nhắc đến