You have the following known facts: smoking causes accumulation of materials in the lungs, thereby decreasing oxygen-absorbing capability of the lungs. long-term smoking causes more accumulation of materials in the lungs. decreased lung capacity increases the workload of the heart. which of the following hypotheses can you make from these observations?

a. stopping smoking eliminates heart problems within two years.
b. stopping smoking eliminates lung problems within two years.
c. new smokers have poorer heart health than long-term smokers.
d. long-term smokers have poorer heart health than non-smokers.
e. people who never smoke will never develop lung problems.

D

Explanation:

According to the details, long term smoking causes more accumulation of materials in the lungs, which increases the workload of the heart. So, D is the correct answer.

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.