Doctors Believe That Smoking Cigarettes Inflames the Bronchial Tubes and So

Multiple Choice

Doctors believe that smoking cigarettes inflames the bronchial tubes and so makes it harder to breathe. To test this they measured the lung capacity (in liters) and the number of cigarettes smoked in a typical day for a sample of adults. Is the scatterplot below consistent with the researcher's hypothesis?

A) Yes, it is consistent.
B) There is no evidence in support or contradiction of the hypothesis.
C) No, it contradicts this hypothesis.