Final answer:
The weight of a body on Earth is greater than its weight on the moon.
Step-by-step explanation:
The weight of a body on Earth is greater than its weight on the moon. On Earth, the weight of a body is determined by the force of gravity acting on it, which is approximately 9.8 N/kg. Therefore, if the weight of the body on the moon is 5 N, its weight on Earth would be greater than 5 N. So, the correct answer is option c. 30N.