Easiest/hardest AP class - Opinions?

Test Preparation AP Test Preparation
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From what I took, I’d say that (from hardest to easiest), this is my list:

  1. Physics C E&M
  2. Physics C Mechanics
  3. Statistics
  4. U.S. History
  5. Calculus BC
  6. Physics B
  7. Comparative Government
  8. Macroeconomics
  9. Environmental Science