If a sample contains impurities, its melting point will be than a pure sample.

lower.

It means that the solid substance with impurities will need a lower temperature than the pure substance to pass to liquied state.

This is due to the fact that the impurities interfere with the attractive forces of the solid which weakens its structure and makes it can melt at a lower temperature.

Bthats what im doing to and i figured it out it is b

As long as you're breathing, you'll be fine : /p. s. if you aren't breathing, you'll pass out. mark as brainliest.