Sort independent and dependent clauses by dragging and dropping them into the appropriate categories.

idk what words your dragging but always remember that a independant clause is a sentence that has a subject and verb and expresses a complete thought and makes since for example, "I enjoy sitting by the fireplace and reading." thats a complete sentence, a dependant clause is a sentence that begins with a subordinating conjunction, such as if, after, before, because, although, or when, and it requires the support of an independent clause to constitute a complete sentence which would make it somthing like a complex sentence which has a independant and dependant clause in it

Explanation:  

and you can read over that if needed

The answer to the question above is C. there were dinosaurs in the Jurassic Period, which went extinct in the Cretaceous Period. The Jurassic period happened during the middle period of the Mesozoic Era, and ended during the beginning of Cretaceous Period.