Water Has a Specific Heat Capacity of 4,186 J/kg °C

Water has a specific heat capacity of 4,186 J/kg °C. A tank contains 500 kg of water at 10.0 °C. The water is heated to a temperature of 90.0 °C. If electricity costs $0.100 per kilowatt-hour, then what is the cost of heating the water?

A) $8.75
B) $6.22
C) $4.65
D) $3.79
E) $3.10