Suppose we have an iron nail and an iron ball of the same mass. When immersed in water, an iron ball may float but the nail will always sink. What is the reason for this ?

• A. Due to the size of both, the buoyant force is greater on the ball than on the nail.
• B. The viscous force on the ball is relatively high.
• C. The viscous force on the nail is relatively high.
• D. The force of gravity affects the ball differently than the nail.