Claudia's dad has a family history of cancer. He tries to prevent developing the disease himself. Even though he works outside every day, he always wears sunscreen, long sleeves and pants, and a hat. He only smokes outside in the shade of a tree or building. He eats healthy foods, and exercises almost daily. He even makes an effort to see his doctor regularly for well-checks.
Which of Claudia's dad's actions is not helping him to avoid cancer?
A. He eats healthy foods, and exercises almost daily.
B. He only smokes outside in the shade of a tree or building.
C. He always wears sunscreen, long sleeves and pants, and a hat.
D. He even makes an effort to see his doctor regularly for well-checks.