C) Some scientists think that Stonehenge was used like a calendar.
Explanation:
Reading through the passage, we can see in this sentence:
"Some believe that the stone circle was used as a calendar to show how the sun and moon moved. This may have helped ancient people follow the seasons. This in turn would help people predict seasons."
The wording and phrasing help support our argument. It says on how they used it like a calendar, and how some scientists believe in that usage. (Hope this helps)
