Which of the following means of transport would most likely be used for moving a medium-sized molecule (like a monosaccharide or an amino acid) from

Which of the following means of transport would most likely be used for moving a medium-sized molecule (like a monosaccharide or an amino acid) from a low concentration on the outside of a cell to a high concentration on the inside of a cell?A.facilitated diffusion through a transporter proteinB.passive transportC.facilitated diffusion through an ion channel proteinD.active transport through a "pump" protein