Choose exactly A, B, C, or D. SOURCE: Morgan believed that ...

Prompt

Choose exactly A, B, C, or D. SOURCE: Morgan believed that warfare became common only after permanent settlements appeared. Which proposition is directly asserted by the source? A. Warfare became common only after permanent settlements appeared. B. Morgan believed that warfare became common only after permanent settlements appeared. C. Permanent settlements caused warfare. D. Warfare was uncommon before permanent settlements appeared.