Final answer:
Many cancer deaths in the U.S. can be attributed to controllable factors such as smoking and lifestyle choices, with an estimated one-third of cancer deaths being preventable through healthy behaviors.
Step-by-step explanation:
Controllable Factors in Cancer Deaths
Cancer is a major cause of death in the U.S. and is influenced by both genetic and environmental factors. While some cancers are attributed to genetic predisposition, many deaths from cancer can be attributed to controllable factors. Behaviors such as smoking, poor diet, and physical inactivity contribute significantly to cancer mortality. Not using tobacco could prevent an estimated 25 percent of cancer deaths, and a combination of healthy diet, exercise, and maintaining a healthy weight could prevent another 35 percent. It is important to note that avoiding known carcinogens such as UV radiation and radon also play a role in reducing cancer risk.
Therefore, the correct answer to the question is option (c): About one-third of cancer deaths in the U.S. are attributed to controllable factors.