Which of the following scenarios would provide the best evidence to support the following claim: Energy travels from areas of high temperature to areas of low temperature

A. You activate a hand warmer and it heats up

B. You feel a spark from the van de graaf generator

C. You mix baking soda and vinegar and bubbles form, the temperature of the solution decreases

D. You go directly from the hot tub to the pool, the water feels freezing cold.