The bar graph shows the results of a poll where people chose one of four options (A, B, C, or D). Which of the following statements about the data presented in the bar graph is true? 
Option D was chosen by the fewest people, with 2 votes.
The mode of the data is option A.
The total number of people polled is 40.
The difference between the most chosen option and the least chosen option is 15.
