Answer:
b. Carbon monoxide poisoning
Explanation:
Carbon monoxide poisoning occurs through excessive inhalation of this chemical compound which is very harmful to health and can even be fatal. The symptoms of this intoxication are headache, nausea, weakness, tinnitus, vomiting, loss of consciousness, arrhythmia cardia, among others. The family exposed in the question has some of these symptoms, which allows us to conclude that this family is probably carbon monoxide poisoned.