Which of the following methods is most suitable for obtaining a pure, dry sample of sodium chloride from a mixture of solid sodium chloride and sand?

• A. Shake the mixture with water, filter and dry the residue on the filter paper.
• B. Shake the mixture with water, filter and evaporate the filtrate.
• C. Heat the mixture gently and collect the substance which sublimes.
• D. Shake the mixture with water and filter it.