Question

base your answer on the graph below and on your knowledge of biology. the graph shows the effects of stopping smoking at different ages along with the cumulative risk (%) of death from lung cancer up to age 75 in men. the study took place in the united kingdom. cumulative risk (%) of death from lung cancer doctors claim that the earlier someone stops smoking, the lower the risk of dying of lung cancer. which statement best describes evidence that supports this claim? a) men that smoked 40 cigarettes per day have the same risk as smoking 20 cigarettes per day at any age. b) men that continued to smoke had an approximately 16% risk of death, and those that stopped at age 30 had a lower risk. c) men that never smoked had the same risk as those that smoked until the age of 30. d) men that stop smoking at age 40 have a greater risk of bladder cancer than lung cancer.

Explanation:

By observing the graph, men who continued smoking had a high - approximately 16% risk of death from lung cancer by age 75, while those who stopped at age 30 had a much lower risk. This shows that the earlier one stops smoking, the lower the risk of dying from lung cancer. Option A is about cigarette quantity not quitting age. Option C is incorrect as non - smokers have a much lower risk than 30 - year smokers. Option D is about bladder cancer which is not relevant to the claim about lung cancer and quitting age.

Answer:

B. Men that continued to smoke had an approximately 16% risk of death, and those that stopped at age 30 had a lower risk.