The main idea is in the first sentence, so your answer should be 1.
The 'dark past' is most likely referring to a period of time marked by traumatic suffering. The full line seems to be saying that the 'dark past' taught these people faith. People often only have faith to hang on to in times of suffering. So, I'd say the answer is c.
The answer is A. Implied. cause its asking a question not stating facts.
Answer:
Environmental scientists use their knowledge of earth's systems to protect the environment and human health. They do this by cleaning up contaminated areas, making policy recommendations, or working with industry to reduce pollution and waste.
Explanation:
