Correct option is B
Heat supplied to a system is measured in joules. Joules are the International System of Units (SI) unit for heat energy.
In the SI system, all forms of energy are measured in joules.
One joule is the amount of energy needed to raise the temperature of a given mass by one degree.
The rate of heating is measured in watts, which is defined as one joule per second.
Other units of heat include the British thermal unit and the calorie.
