Final answer:
The duration of illness for Toxin Nervosa is not specified but is inferred to be rapid and potentially severe or permanent based on the effects of nerve agents and stroke, which can cause significant damage in a matter of hours.
Step-by-step explanation:
The duration of illness for Toxin Nervosi can vary. However, based on the information provided that discusses various types of diseases and their onset times, as well as the rapid effects of nerve agents, we can infer that the illness from toxin exposure, similar to exposure to nerve agents, could be rapid and potentially severe. Nerve agent poisoning, for example, leads to a rapid onset of symptoms and can cause death within minutes from asphyxiation or cardiac arrest. Similarly, damages such as those seen in a stroke show that neurons can begin deteriorating within a few minutes, causing permanent damage in just a few hours. Therefore, while not explicitly stated, it's more likely that Toxin Nervosa would exhibit a rapid progression similar to that of nerve agent exposure or stroke, indicating that option A) A few hours or option D) Permanent could both be relevant depending on the severity and type of toxin exposure.