13. In a chemistry class, a learner prepared a solution by mixing 35 g of salt in 135 g of water. What are the concentrations of the solute and solvent in percent (%) by mass? A. solute: 20%; solvent: 80% B. solute: 26%; solvent: 73% C. solute: 21%; solvent: 79% D. solute: 30%; solvent: 70%​