When 50cm² of a saturated solution of sugar of molar mass 342 g at 40^oC was evaporated to dryness, 34.2g of dry solid was obtained. The solubility of sugar at 40^oC is

• A.2.0 mol dm^-3
• B.3.5 mol dm^-3
• C.7.0 mol dm^-3
• D.10.0 mol dm^-3
• E.