I'd say B. but i'm not sure. It could be D. aswell
Answer:
C. A gap in the rock record
Explanation:
Answer:
The most commonly used methods are: published literature sources, surveys (email and mail), interviews (telephone, face-to-face or focus group), observations, documents and records, and experiments.
Explanation:
They all were however they want you to answer Russia because Russia left the Axis Powers after Hitler attacked Russia.