[单选题]
________
A. To investigate how being overweight impacts, on health.
B.To find out which physical drive is the most powerful.
C.To discover what most mice like to eat.
D.To determine what feelings mice have.
[单选题]
A. To investigate how being overweight impacts, on health.
B.To find out which physical drive is the most powerful.
C.To discover what most mice like to eat.
D.To determine what feelings mice have.