Generally the most important part of a main idea is the topic sentence.
You should include as many details as possible.
Answer:
The Thrill of the Chase by Forrest Fenn is a treasure hunt for a 10x10x5 inch bronze chest filled with over a million dollars worth of gold and other treasures. This secreted cache is hidden somewhere in the Rocky Mountains. If you can find it, you can have it!
Identity , it doesn't say it a lot in his works but that's the main idea
I think the answer would be : A. As objectively as possible
In writing, Realist writers tend to hate traditional good vs bad content. They usually emphasize the complexity of human mind and behavior that determine our decision making. Making life portrayed as something grey. Not Black and white
hope this helps