Final answer:
The two sentences that explain what people surmise happened to Amelia Earhart are that some believe she landed on an uninhabited island and others think she disappeared over the ocean.
Step-by-step explanation:
The two sentences in this excerpt that explain what people surmise happened to Amelia Earhart are:
- b) Some believe she landed on an uninhabited island.
- d) Others think she disappeared over the ocean.
These sentences provide different theories about Amelia Earhart's fate. Some speculate that she may have landed on an uninhabited island, while others believe that she disappeared over the ocean. These explanations are based on assumptions and the lack of concrete evidence regarding her disappearance.