Sudden movement on a fault can cause a tsunami when:

A) a hurricane or cyclone is occurring
B) the fault suddenly uplifts or downdrops the seafloor
C) hot water trapped below the seafloor is released
D) a fault on land has a large displacement
E) none of these

Sudden Movement

An abrupt shift, typically referring to geological events like earthquakes.

Fault

A fracture or zone of fractures in rock along which there has been displacement of the sides relative to one another parallel to the fracture.

Tsunami

A series of ocean waves with extremely long wavelengths and periods, typically caused by underwater earthquakes, volcanic eruptions, or landslides.