Students X and Y are seated on a seesaw. Student X weighs $400\,\text{N}$ and student Y weighs $600\,\text{N}$. The seesaw is balanced in equilibrium. Which statement gives the correct reason why the seesaw is in equilibrium?
- AThe resultant force is zero and the resultant moment is zero.
- BThe resultant force is $200\,\text{N}$ and the resultant moment is zero.
- CThe sum of the downward forces is zero and the resultant moment is zero.
- DThe total downward force is $1000\,\text{N}$ and the resultant moment is $200\,\text{N m}$.