Step-by-step explanation:
The correct answer is:
d) Depression.
Research has shown that individuals with depression are more likely to smoke compared to those without depression. There is a complex relationship between smoking and mental health conditions such as depression. While smoking is often seen as a form of self-medication for individuals with depression, it is important to note that smoking can worsen the symptoms of depression in the long run.
It is worth mentioning that the other options listed (a) a good understanding of the risks, b) high levels of education, and c) parents who do not smoke) are generally associated with a lower likelihood of smoking. Having a good understanding of the risks of smoking, higher education levels, and non-smoking parents are factors that have been found to be linked to reduced smoking rates. However, it is important to recognize that individual circumstances and other factors can influence an individual's smoking behavior.