In keeping busy, a person who is trying to quit smoking should
a. stay in the company of his or her friends who smoke
b. go places where smoking isn’t allowed
c. keep cigarettes with him or her, just in case
d. all of the above

B: Go places where smoking isn't allowed.
All the other options would not work because the first one could possibly pressure the person who is trying not to smoke to smoke, C would not work because that would provide temptation, and D would not work because A and C would not work