A sphere of iron and another of wood of the same radius are held under water. Let Fₐ and Fᵦ are the uptrusts of iron and wood respectively. Compare the upthrust on the two spheres.
A. Fₐ = Fᵦ
B. None of the above
C. Fₐ > Fᵦ
D. Fₐ < Fᵦ