The diagram depicts four forces acting on a circular disc. Each force has magnitude $F$. Two of the forces act vertically, while the other two forces act horizontally. All four forces lie in the same plane as the disc. No additional forces act on the disc. The disc has diameter $d$. Which statement is correct?
- AThe disc is in equilibrium because the resultant force is zero.
- BThe disc is not in equilibrium because the resultant force is $4F$.
- CThe disc is in equilibrium because the resultant torque is zero.
- DThe disc is not in equilibrium because the resultant torque is $2Fd$.