Regarding Caffeine, Which of the Following Statements Is FALSE

Regarding caffeine, which of the following statements is FALSE?

A) Less than ten percent of all caffeine users show signs of dependence.
B) Pregnant women who consume as little as two cups of coffee a day increase the risk of having a miscarriage.
C) Pregnant women should consider giving up caffeine entirely because of a suspected link between caffeine and birth defects.
D) Although people who drink 15 to 20 cups of coffee a day develop the symptoms of caffeinism, lower dosages can intensify anxiety and other psychological problems.