Answer: C. June, July, September.
Explanation:
We have a graph representing the average monthly rainfall.
The graph has plotted the months on the x-axis and the rainfall in inches on y-axis.
We can see that the only months having rainfall between 10 to 20 inches are June, July, September and November.
According to the given options, we get,
The months having rainfall between 10 to 20 inches are June, July and September.