The number of students in class XI in science, arts and commerce stream of a school over a period of 4 years (2011-2014) has been depicted through the bar chart given below:
What is the difference between the averages of the number of science and commerce students in the given class over the given period of 4 years?

Options

A. 10
B. 8
C. 12
D. 5

Answer

D