WHICH OF THE FOLLOWING IS TRUE ABOUT THE DOLPHIN’S SMILE

3. - BAI KIEM TRA 45 PHUT SO 3
BAI KIEM TRA 45 PHUT SO 3

3. Which of the following is true about the dolphin’s smile?

A. It tells us that the dolphin is gentle B. It appears when the dolphin is playing

C. It shows that the dolphin is happy D. It is a permanent facial expression.