During a Class at a Nursing Home on Cancer Prevention

During a class at a nursing home on cancer prevention, a resident asks if one's diet affects his or her risk of developing cancer. The speaker makes the following statements. Which one is incorrect? ​

A) "Citrus fruits may decrease the risk of esophageal cancer."
B) "Fruits and nonstarchy vegetables may reduce the risk of several types of cancer."
C) "Foods rich in folate seem to prevent pancreatic cancer."
D) "Dairy foods have been implicated in many types of cancer."
E) "Tomato products may decrease the risk of prostate cancer."