Our weight, as measured by the spring weighing machine is equivalent of
A. The total gravitational force that Earth exerts on us
B. The total centripetal force required to keep us moving on Earth's axis
C. The total gravitational force that Earth exerts on us + The total centripetal force required to keep us moving on Earth's axis
D. The total gravitational force that Earth exerts on us - The total centripetal force required to keep us moving on Earth's axis
