Final answer:
The concentration of the C6H12O6 solution is already given as 0.0150 M, which means it is 0.0150 mol/L, so the correct answer is A. 0.0150 mol/L.
Step-by-step explanation:
The question asks for the calculation of the concentration of a C6H12O6 solution. When a concentration is given as M, it stands for molarity, which is a unit of concentration represented as moles per liter (mol/L). In this case, the concentration of the C6H12O6 solution is already provided as 0.0150 M, which means the concentration is 0.0150 mol/L. Therefore, the correct answer to the student's question is A. 0.0150 mol/L. There is no need to further calculate the concentration as it is already given.