Which of the Following Is Incorrect Regarding the Spatial Variability

Which of the following is incorrect regarding the spatial variability of net primary productivity?

A) At temperate and high latitudes,the rate of carbon fixing is seasonally variable.
B) Productivity rates are constantly high throughout the year in the tropics.
C) Net primary productivity is highest in the fall and winter in temperate and high latitude areas.
D) Productivity rates in deserts is much less than that of tropical regions.
E) The highest average net primary productivity in a terrestrial ecosystem occurs in the tropical rain forests.