A: Human Body
C is wrong because they don’t have the tools to test it on another planet
See this. I hope you find your answer
Answer:
The experimental scientist
Explanation:
a. moving a 145 kg aluminum sculpture across a horizontal steel platform
b. pulling a 15 kg steel sword across a horizontal steel shield
c. pushing a 250 kg wood bed on a horizontal wood floor
d. sliding a 0.55 kg glass amulet on a horizontal glass display case