A person lifts $20$ tiles from the ground up to the roof of a house. Each tile has a mass of $1.2\ \text{kg}$. The roof of the house is $15\ \text{m}$ above the ground. How much work does the person do against gravity on the tiles in carrying them to the roof?
- A$37\ \text{J}$
- B$180\ \text{J}$
- C$360\ \text{J}$
- D$3500\ \text{J}$