A use clues and your own experience
I believe "observation" is the answer. Hope I helped!
D. The hints or suggestions that tell the reader what is going to happen in a story
This Statement is not grammatically correct.
Explanation:
The last shipwreck sat on the bottom of the ocean. It was full of treasure.
The period is needed since they are two independent clauses. Using a coordinating conjunction is also valid to connect the two clauses.
The last shipwreck sat on the bottom of the ocean, and it was full of treasure.