Ruben prepares a solution by putting a pinch of orange crystals to water in a beaker, then by consistent stirring, the crystal dissolve. Which of the statements above are likely to be observed by Ruben? I. The water becomes orange. II. The color of the solution becomes darker. III. Crystals disappear from the bottom of the beaker. IV. The beaker and its contents become heavier as attiring continues.

• A. I and II only
• B. III and IV only
• C. I, II, and III only
• D. I, II, and IV only