Which Answer Below Best Describes All Atoms of a Particular

Which answer below best describes all atoms of a particular element?

A) They possess the same number of electrons, the same atomic number, and the same mass, but have nothing else in common.
B) They possess the same mass and the same chemical properties but have nothing else in common.
C) They possess the same number of electrons and the same atomic number but may differ in mass.
D) They possess the same number of electrons, chemical properties, and mass but have nothing else in common.
E) They possess the same atomic number and the same mass but have nothing else in common.