The Plot Below Displays the On-Base Percentage for All Major

Multiple Choice

The plot below displays the on-base percentage for all Major League Baseball players who played in at least 15 games during the 2018 MLB season based on the player's position.
Positions: 1/2/3B = 1st/2nd/3rd base, C = catcher, C/L/RF = center/left/right field, DH = designated hitter, P = pitcher, SS = short stop
On-base percentage = (hits + walks + hit by pitch) /(total plate appearances)
-Which of the positions has the smallest inter-quartile range (IQR) of on-base percentages?

A) 3B
B) CF
C) DH
D) P