50 points) please help! no links, brainliest, extra points. I understand if you need points, you can go to my old questions and answer them for points, please only answer if your 100% sure you're correct. I've redone this over 20 times, asked over 50, and failed all those times. thank uu.

The dot plot below shows the number of vacations taken by the sixth-grade students at Walker Junior High one year.

What is the interquartile range of the data set shown?
A. 4
B. 3
C. 1
D. 2