Atomic structure and the Periodic Table — practice question

State the electron’s relative charge and relative mass.

• Arelative charge 0, relative mass $1$
• Brelative charge 0, relative mass $\frac{1}{2000}$
• Crelative charge $-1$, relative mass $1$
• Drelative charge $-1$, relative mass $\frac{1}{2000}$