A Study of a Program to Help People Quit Cigarette

A study of a program to help people quit cigarette smoking had three groups of subjects. The first group received one supportive phone call 10 days after attending a program on strategies to resist smoking. A second group received a supportive phone call every week for 6 weeks after attending the program. A third group received no supportive phone calls after attending the program.
-What is the dependent variable in the research scenario?

A) Program on strategies to resist smoking
B) Elimination of cigarette smoking
C) Weekly supportive phone call
D) No supportive phone call