The answer you are looking for is D
All of the above because it is all mental.
Ídem se emplea fundamentalmente en notas o referencias bibliográficas, cuando se quiere señalar que la fuente citada es la misma anterior. Asimismo, también se puede usar para indicar que una obra tiene el mismo autor que la obra anterior
Accidents are unfortunate events that happened unintentionally, while risky behaviors usually intentional even though the negative effects are already known.
One example of accidents is if plane passengers died during the plane crash. And the example of a risky behavior is to use tobacco product despite the negative effects it has on health.