Refer to the Figure

Multiple Choice

Refer to the figure.
A plant requires a minimum of 50 mm of precipitation per month to grow. Its water requirements increase with increasing temperature, such that for every 1°C that the average monthly temperature is above freezing, it requires an additional 1 mm of precipitation. Based on the climate diagram, and assuming the weather reflects long-term climatic averages, this plant should be able to grow during how many months of the year?

A) 6
B) 9
C) 11
D) 12