Identify the correct statements with reference to tornadoes.

A. A phenomenon like tornado over the ocean is called waterspout.

B. A pre-requisite for tornado development is the formation of a mesocyclone.

C. A tornado represents a rotating funnel shaped column of air which extends from cumulonimbus clouds down to the surface.

D. Japan is most prone to tornadoes in the world.

Choose the correct answer from the options given below: