Which statements about tsunamis are true?
a. they can occur only in water.
b. they can occur in water and on land.
c. we can predict them.
d. underwater landslides can cause them.
e. dam failures can cause them.

a,d, and e

Explanation:

It is referring to where it forms and not where it can hit, so it is water and not land. Underwater landslides and dam failures make a ripple effect. Tsunamis are just massive ripples in water.