At the surface of a planet, lifting a $1.0\,\text{kg}$ mass through a vertical distance of $10\,\text{m}$ against gravity requires $30\,\text{J}$ of work. What amount of work is required on this planet to lift a $4.0\,\text{kg}$ mass through $5.0\,\text{m}$?
- A$15\,\text{J}$
- B$60\,\text{J}$
- C$120\,\text{J}$
- D$200\,\text{J}$