How many forces are acting on a stationary raft floating in a swimming pool A1 B2 or C3

There are at least two forces on it, and there could be more.

Vertical forces:

- - gravity, directed downward

- - buoyant force, directed upward

These two forces must be exactly equal, so that the net

vertical force on the raft is zero. Otherwise, it would be

accelerating either up or down.

Horizontal forces:

We know that the net horizontal force on the raft is zero.

Otherwise, it would be accelerating horizontally.

But we don't know if there are actually no horizontal forces

at all, or a balanced group of horizontal forces, that add up

to a net force of zero.