Sao đáp án D vậy mình thấy B cũng hợp lí mà
" But to count, animal has to recognize that each object in a set corresponds to a single number and that the last number in a sequence represents the total number of objects"
"The theory has been tested on eleven dogs. They were first shown treats before a screen was lowered so that the treats were out of sight"
-> Cụm mình in đậm nghĩa la gì á mấy bạn
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Sinh Học lớp 12
