2-C. Whatever is left of the box and its secret contents are buried deep underneath rocks and mud somewhere down below us and will be very difficult to find.Whatever is left of the box and its secret contents are buried deep underneath rocks and mud somewhere down below us and will be very difficult to find.
3-C. Most people didn't believe the story, but Grandfather thought the treasure was real and buried on our island.Most people didn't believe the story, but Grandfather thought the treasure was real and buried on our island.
4-C. He buried it on an unknown island to hide it from pirates, but died without telling anyone the exact location.He buried it on an unknown island to hide it from pirates, but died without telling anyone the exact location.