The right option is c. usually is caused by consuming improperly home-canned food.
Botulism is a severe food borne illness caused by the bacteria clostridium botulinum. This illness is caused by eating foods contaminated with the bacteria or its toxin. Ingestion of foods that are not canned properly at home is the major cause. Symptoms of botulism generally appear 12 to 72 hours after eating contaminated food.