[QA] It can be inferred that when humans crossed into the New World, they ______ A.                  B.   C.    

Question:

It can be inferred that when humans crossed into the New World, they ______

A.                  B.  

C.       D.  

• A.
  had previously hunted mammoths in Siberia.
• B.
  soon learned to use dogs to hun mammoths.
• C.
  brought mammoths with them from the Old World.
• D.
  had never seen mammoths before.