Electric current — practice question

A metal wire carries an electric current of $4.0\,\text{mA}$. How many electrons pass a given point in the wire during a time of $10\,\text{hours}$?

• A$2.5 \times 10^{17}$
• B$2.5 \times 10^{20}$
• C$9.0 \times 10^{20}$
• D$9.0 \times 10^{23}$