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About 30 percent to 40 percent of all cancers are related to our lifestyle choices, including the foods we eat, how much exercise we get and how well we watch our weight. Are you making the right choices? Here's a quiz based on a report on cancer prevention from the American Institute for Cancer Research.

1. Exercise helps prevent colon cancer. True or false?

2. A plant-based diet of vegetables, fruits, whole grains and beans seems to decrease colorectal cancer risk. True or false?

3. A diet high in red meat, processed meat and fat in- creases colorectal cancer risk. True or false?

4. Fiber may reduce the colon's exposure to cancer-causing substances by moving wastes out quickly. True or false?

5. Vitamin supplements help prevent cancer. True or false?

6. A diet high in salt has no effect on cancer risk. True or false?

7. Overweight and obesity has no effect on cancer risk. True or false?

8. Grilled foods cause cancer. True or false?

9. Green tea may have anti-cancer benefits. True or false?

10. All berries, particularly strawberries and raspberries, are especially rich in a substance called ellagic acid, which has shown the ability to prevent cancers of the skin, bladder, lung, esophagus and breast in laboratory studies. True or false?

Answers: 1) T. Exercise speeds the movement of food through the intestine and decreases bile and acid secretion. 2) T; 3) T; 4) T; 5) F; 6) F. Diets containing a large amount of salted fish (such as those in Asian countries) increase the risk of stomach cancer. 7) F. Research shows that obesity is not only a risk for diabetes and heart disease but also for several types of cancers. 8) T. Research shows that exposing meats to direct flame, smoke and intense heat can cause the formation of carcinogens. 9) T. In laboratory studies, green tea has been shown to slow or completely prevent cancer development in colon, liver, breast and prostate cells. 10) T. This phytochemical acts as an antioxidant; it helps the body deactivate specific carcinogens, and it helps slow the reproduction of cancer cells.

Source: American Institute for Cancer Research, www.aicr.org