According to the Research on Nicotine,which of the Following Statements

According to the research on nicotine,which of the following statements is FALSE?

A) Users of smokeless tobacco run a higher risk of oral cancer.
B) The "cold turkey" approach to quitting smoking is considered the most effective approach in producing permanent nonsmokers.
C) Secondary smoke causes about 3,500 lung cancer deaths and as many as 70,000 heart disease deaths each year in the United States alone.
D) Young children are especially vulnerable to secondhand smoke.