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A student is trying to determine if the composition of ice cubes affects the melting point. Which will be the BEST investigation to use?
A. Freeze pure water in 3 identical ice cube trays, and then place each tray on a table in different rooms.
B. Freeze pure water, sugar water, and salt water in 3 identical ice cube trays, and then place the trays side by side on the same table.
C. Freeze pure water in 3 different-sized ice cube trays, and then place each tray on a different table in the same room.
D. Freeze pure water, sugar water, and salt water in 3 different-sized ice cube trays, and then place the trays side by side on the same table.
What is B. Freeze pure water, sugar water, and salt water in 3 identical ice cube trays, and then place the trays side by side on the same table.