An electric heater of resistance $6 \, \Omega$ is run for $10 \, \text{minutes}$ on a $120 \, \text{V}$ line. The energy liberated in this period of time is:
- A$7.2 \times 10^3 \, \text{J}$
- B$14.4 \times 10^5 \, \text{J}$
- C$43.2 \times 10^4 \, \text{J}$
- D$28.8 \times 10^4 \, \text{J}$
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