A biologist created the following graph to show the relationship between the temperature of water (x), in degrees Celsius, and the number of insect larvae (y) in the water: graph of y equals minus 2 times the square of x plus 20 times x plus 400 What do the x-intercepts of the graph represent? A There were 20 larvae in the water at 0 degrees Celsius. B There were 10 larvae in the water at 0 degrees Celsius. C The water had no larvae at −10 degrees Celsius and 20 degrees Celsius. D The water had maximum larvae at −10 degrees Celsius and 20 degrees Celsius.