What is the difference between uniport and symport?

Find correct statements from the following
$\mathrm{A})$ Protein transporters are responsible for maximum rates of transport under saturated state
$\mathrm{B})$ Translocation of substances in bulk flow requires hydrostatic pressure gradient
$\mathrm{C})$ Root pressure plays the greatest contribution for upward movement of water in tall plants
$\mathrm{D})$ Transport proteins of endodermal cells are control points for active transport of ions in two directions

The correct answer is

Observe the given diagram and choose the correct option with respect to transport of molecules.