Which of the Following Statements Best Describes the Graph Below

Multiple Choice

Which of the following statements best describes the graph below?

A) The graph shows that for those who used nicotine patches there is a fairly normal distribution, whereas those who used hypnosis show a skewed distribution, where a very small proportion of people (relative to those using nicotine) smoke more than 2 cigarettes per day.
B) The graph shows that for those who used hypnosis there is a fairly normal distribution, whereas those who used nicotine patches show a skewed distribution, where a very large proportion of people (relative to those using nicotine) smoke less than 4 cigarettes per day.
C) The graph looks fairly unsymmetrical, indicating that the two groups are from different populations.
D) The graph looks fairly symmetrical.This indicates that both groups had a similar spread of scores before the intervention.