Which pairing of the current in a resistor and the duration for which it flows produces a charge of $240\,\text{C}$ passing through the resistor?
- Aa current of $2.0\,\text{A}$ for $120\,\text{s}$
- Ba current of $4.0\,\text{A}$ for $960\,\text{s}$
- Ca current of $6.0\,\text{A}$ for $40$ minutes
- Da current of $8.0\,\text{A}$ for $30$ minutes