Aria, Olenna, Stark, and Yara each prepare a cup of coffee. The students use similar amounts of brewed coffee, sugar, and cold milk. This table describes each student’s method of dissolving the sugar in the coffee.

Aria

Adds sugar to hot coffee; add cold milk; stirs

Olenna

Adds sugar to hot coffee; stirs; adds cold milk

Stark

Adds cold milk to hot coffee; add sugar; stirs

Yara

Add cold milk to hot coffee; stirs; adds sugar

Which student uses the method that will dissolve the sugar in the coffee the fastest?

A.
Olenna

B.
Aria

C.
Stark

D.
Yara

A. Olenna

Explanation:

Sugar melts the fastest when it is in a hot liquid. Stirring also increases the rate at which the sugar melts.

Olenna stirs the sugar while the coffee is still hot and before she has added the cold milk allowing the sugar to dissolve the fastest compared to the other methods of dissolving the sugar.

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