An electrical heater has a power of $3.0\,\text{kW}$. It is left on for $2\,\text{hours}\,30\,\text{minutes}$. The charge for running the heater for this period is $120\,\text{c}$. What is the price of $1.0\,\text{kWh}$ of electrical energy?
- A$16\,\text{c}$
- B$17\,\text{c}$
- C$40\,\text{c}$
- D$48\,\text{c}$