Causation, from the article:

> Ethanol, the form of alcohol present in beer, wine and liquor, breaks down to form a known carcinogen called acetaldehyde, which damages DNA and interferes with cells' ability to repair the damage.

> Alcohol can also increase levels of hormones, including estrogen. Hormones signal cells to grow and divide. With more cell division, there are more opportunities for cancer to develop. Alcohol also reduces the body's ability to absorb certain cancer-protective nutrients, including vitamins A, C, D, E and folate.