Choose the Correct Statement

Choose the correct statement.

A) Instability leading to decay by alpha particle emission is found mostly in nuclides of very large mass number.
B) Decay by beta emission is confined to nuclides of very low mass number.
C) Ejection of an electron by a nuclide results in a nuclide of next lower mass number.
D) All radiations emitted by radioactive nuclides consist of charged,high energy particles.
E) Many alpha and beta emissions are followed by gamma emissions.