C, the natives didn't have immunities to the diseases
I'd say the answer is C because that doesn't really narrow down what he is trying to write about. he needs a more complex question for research.
The correct answer is:
Prewriting
Prewriting is stage of the writing process that involves gathering and selecting ideas. It can include creating lists, researching, brainstorming, creating charts, reading to discover more about the author's style, talking, collecting memorabilia or clips from other texts, and free-writing.
Answer:
A. that my answer concerned
Mascot means a person or thing that brings good luck. Therefore, the answer will be “talk to you”