The entire premises of this question infers to the concept of Creation. So the reason why the universe was created, in that sense, was so god could create a land to support the civilization he wanted.
just analyze it in this way:
20cos30*=10( radical 3 )
20sin30*=10
C is the correct answer but the best possible answer is that work is done when a force is imposed on an object and the object moves in the same direction as the force
Hope this helps!