The independent variable of the above experiment is the the mass of the blocks (option C).
The independent variable of an experiment is the variable that is changed or manipulated in a series of experiments. The independent variable is also called manipulable variable.
On the other hand, the dependent variable is the variable that is recorded or measured in the experiment.
According to this question, a student drops three blocks from the same height and measures the time it takes for the blocks to hit the ground. Each block has a different mass.
This shows clearly that the independent variable is the mass of the blocks because it is the variable that is manipulated.
Learn more about independent variable at: https://brainly.com/question/1479694
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