Show/suggest/indicate/prove

Select the appropriate word(s) that a researcher should use if the result of an experiment are not clear or conclusive.

The results ______ that under certain circumstances, Drug X may be more effective than Drug Y for children under 12.

I)show
II)suggest
III)indicate
IV)prove

A.(II)only
B.(II)and(III)
C.(I)only
D.(I)and(IV)

Is "B" the correct answer?
thanks