Answer:
C. 3
Explanation:
We have been given that graph of a function. We are asked to find the period of our given function.
We know that period of a function is the distance required for the function to complete one full cycle.
Upon looking at our given function, we can see that period of function starts at x equals 0 and completes at x equals 3. The second period starts 3 and completes at 6.
Since the graph of function repeats itself after each 3 units, therefore, the period of our given function is 3 and option C is the correct choice.