1) A 12 g sample of a vegetable is estimated to have a vitamin C concentration of 30 mg/100 g. The high-performance liquid chromatography (HPLC) instrument used for the analysis produces a linear calibration curve for vitamin C concentrations between 0.020 mg/mL and 0.10 mg/mL. Which one of the following volumetric flasks, made up to the mark, would be appropriate for preparing the vegetable sample solution for analysis?
A. a 25.00 mL flask
B. a 100.00 mL flask
C. a 250.00 mL flask
D. a 500.00 mL flask

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