Which collection of solutes, when dissolved in 100 ml of distilled water, exerts the highest osmotic pressure?

A) 1 mmol NaCl; 1mmol Mg²⁺
B) 2 mmol sucrose; 1 mmol Na⁺
C) 2 mmol glycine; 1 mmol taurine
D) 2 mmol arginine; 1 mmol NaCl