A student has a sample of ocean water that they take to science class. what steps could be taken to determine to classify the ocean water as a suspension, solution, element, or compound?

A) Examine the pH of the sample. If the pH is exactly neutral, it is a pure substance that is a compound.

B) Evaporate the water. If salt is left behind, the sample is a mixture that can be defined as a solution.

C) Let the sample settle. If the salt settles to the bottom, it is a mixture that is classified as a solution.

D) Observe the diffraction of light as it moved through the sample. If light does not scatter, it is a pure substance that is elemental. ​