All of the above
Explanation:
Sodium chloride popularly known as common salt can successfully be used to melt ice in anywhere in the world. Canada for most part is located close to the pole and it is always cold round the year.
Pure solid substances have a sharp melting point or low narrow range of melting. When an impurity such as sodium chloride is introduced, it causes the depression in the melting points or very narrow melting range.
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