Answer:
The answer to your question is: C
Explanation:
From the description given, we can conclude that the independent variable is the hour and the dependent variable is the number of red cars.
A)The independent variable is the time and the dependent variable is the number of red cats. The independent variable is correct but the independent variable is not (CATS?) , so this option is incorrect.
B)The independent variable is the number of red cars and the dependent variable is the time. This option is incorrect because the dependent and independent variables are interchanged.
C)The independent variable is the time and the dependent variable is the number of red cars. This is the correct option it describes the same that I wrote in the explanation.