17. A pure compound melts at 48-49 degrees Celsius. If a trace amount of an impure compound, whose melting point is 80-82 degrees Celsius, is mixed in with the first compound, what happens to the melting point of the pure compound?

A. The second compound would lower the melting point of the first one

B. It is impossible to determine without knowing the identity of the two compounds.

C. The second compound would raise the melting point of the first one.

D. The second compound would have no effect on the melting point of the first one.