According to the Research on Nicotine and Cigarette Smoking, Which

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

A) In large doses, nicotine causes stomach pain, vomiting and diarrhea, cold sweats, dizziness, confusion, and muscle tremors.
B) The use of smokeless tobacco, such as chewing tobacco and snuff, has not been shown to cause any cancers at this time.
C) Smoking is the leading cause of preventable deaths worldwide.
D) Secondary smoke causes about 7,300 lung cancer deaths and as many as 34,000 heart disease deaths each year in the United States.