D. Use a condom during every sexual encounter
Gases can be produced by normal flora (bacteria that normally lives in the intestines) and harmful bacteria as well.
The answer is most likely than, it is because the poor does not acquire large sum of money where in they could use to ensure safety in terms of their health. Such as having enough money to have regular check ups, vaccines or medicine. They would likely spend the money that they acquire to food and shelter because it is more essential to them. That is why they are prone to have or acquire diseases than the affluent.
Purpose mean intended or result end determination
That substance would be cathartic
