What factors may contribute to aging? a. cells stop dividing after 50 divisions. b. cells become more and more damaged. c. genes “tell” cells to stop dividing. d. all of the above

Other possibly contributory lifestyle factors include alcohol consumption, stress, diet, exercise, disease, and medication. In summary, the genetic influences on aging may be highly overrated, with lifestyle choices exerting far more important effects on physical aging.

I think it's D. all of the above

answer; (c); /out to the side and directly under the dogs neck.

it should be