Which of the following approaches to quit smoking involves using a nicotine patch?

A) psychotherapy
B) going cold turkey
C) seeking professional help
D) using a substitute source

Nicotine Patch

A transdermal patch that releases nicotine into the bloodstream through the skin, used to aid in quitting smoking by reducing withdrawal symptoms.

Substitute Source

A replacement or alternative means for obtaining information, goods, or services originally sought from a different source.