The mass of a spaceship is $1000\text{kg}$. It is to be launched from the earth's surface out into free space. The value of '$g$ ' and '$R$ ' (radius of earth) are $10{\text{m/s}}^2$ and $6400\text{km}$ respectively. The required energy for this work will be:

1. A
   6.4 \times 10^{11} , \text{Joules}
2. B
   6.4 \times 10^8 , \text{Joules}
3. C
   6.4 \times 10^9 , \text{Joules}
4. D
   6.4 \times 10^{10} , \text{Joules}