What caused our population to double from 1 billion to 2 billion in the 20th century?

What will be an ideal response?

medical advancements that helped eliminate diseases like smallpox, typhus, diphtheria, and cholera.

Psychology

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Research shows that corporal punishment is a(an) ___________ form of discipline in the U.S

A) relatively rare B) normative C) illegal D) most effective

Psychology

College students are more likely to find their experience satisfying at a small college than at a large university

Indicate whether this statement is true or false.

Psychology