You know that an unlabeled water bottle contains at least some water. you measure the freezing point of the unknown substance and find that it freezes at a temperature lower than 0 degrees celsius at 1 atmosphere pressure. which of the following can you conclude?

a. the substance is pure water.

b. the substance will have a boiling point that is less than 100 degrees celsius.

c. the substance will have a vapor pressure that is greater than that of pure water.

d. the substance is an aqueous solution.