A 2.05 m aqueous solution of an unknown solute has a boiling point of 102.1°C. The boiling point elevation constant, Kp, for water is 0.512°C/m. Which one of the following could be the unknown compound?
a. NaCl
b. CH₃OH
c. Na₂CO₃
d. CaBr₂
e. C₆H₁₂O₆