Final answer:
The immediate response when someone swallows a pesticide should be to B) get medical care for them without delay, as it can be a severe and life-threatening emergency.
Step-by-step explanation:
When someone swallows a pesticide, the correct action to take is B. Get immediate medical care for the victim. Pesticide ingestion can lead to severe and potentially life-threatening symptoms that may include nausea, vomiting, diarrhea, and in severe cases, organ failure or even death.
It's critically important not to wait for symptoms to appear before seeking help, as the effects of pesticide poisoning can progress rapidly. Therefore, in cases of pesticide exposure, always prioritize getting emergency medical care for the individual affected.