In her 26 years in the forests of Gombe, Jane Goodall collected data that proved that chimpanzees...
I agree with 'D'.
D) exhibit the kind of curiosity by which new patterns of behavior and expression can be passed on from one to another by imitation and practice.
'will exhibit' is incorrect because it implies something that is going to happen... this is not the case here, since the data is giving information about something that happens.
'Imitation and practice' is definitely better than 'imitating and practicing'.
"Always....Read between the lines"