Question

can salt and sugar pass through a cell membrane via simple diffusion?
no, because they are too large to fit through the cell membrane normally and require a special channel.
yes, but only when moving against the concentration gradient.
yes, because they can easily fit through the cell membrane.
no, because they pass through via osmosis instead.

Explanation:

Simple diffusion allows small non - polar molecules to pass through the cell membrane. Salt (ions) and sugar (polar molecules) are relatively large and polar. They cannot pass through the non - polar lipid bilayer of the cell membrane via simple diffusion. They usually require special transport proteins (channels or carriers). Osmosis is the movement of water, not salt or sugar. Also, simple diffusion is along the concentration gradient, not against it.

Answer:

No, because they are too large to fit through the cell membrane normally and require a special channel.