Aerosol OT (AOT) is used in veterinary medicine as a laxative. If 250 g of AOT is dissolved in 1 000 mL of glycerin (density of glycerin is 1.25 g/mL), the concentration of AOT in the solution is: A. 12.5% w/w. B. 16.7% w/w. C. 20.0% w/w. D. 23.8% w/w.