Which of the Following Describes Radioactive Decay by Beta Particle

Which of the following describes radioactive decay by beta particle emission?

A) The atomic number of the daughter isotope is one more than the parent; the mass numbers are the same.
B) The daughter isotope has an atomic number one less than the parent and a mass number two less.
C) The mass number of the daughter isotope is one more than the parent and both isotopes have the same atomic number.
D) The daughter isotope has an atomic number two less than the parent and a mass number four less.