study the bar graph and answer the question that follows. 

The extent of construction of new railway tracks (in km) in four railway sectors A, B, C, D during two consecutive financial years Y1 and Y2 is presented through the given bar graph.

How much is the average and track length (in km) of A, B, D during Y2 more or less than that of C in Y1 ?

A

100 less

B

33.33 more

C

Neither more nor less

D

50 less