A student wishes to test whether adding a substance (called an anti-freeze) to water lowers the freezing point
of the water. Measuring which of these variables will help
her arrive at a conclusion?

A
Amount of water put into
the container B

Amount of anti-freeze
added to the water

C
Temperature at which the
mixture freezes D

Type of thermometer
used to make the
measurement

There are different kinds of measurements. Measuring which of these variables will help her arrive at a conclusion is Temperature at which the  mixture freezes.

The temperature at which a substance freezes is referred to as its freezing point. Freezing point is also known to be the physical property of matter.

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C  Temperature at which the  mixture freezes

Explanation:

Measuring the temperature at which the mixture freezes provides a good way for the student to arrive at her conclusion.

the answer is c a tornado