When Attempting to Identify a Unique Focal-Point Equilibrium in Static

When attempting to identify a unique focal-point equilibrium in static games:

A) If one identifying principle suggests a unique Nash equilibrium and another suggests multiple Nash equilibria, the first principle tends to dominate.
B) If one identifying principle suggests multiple Nash equilibria and another suggests a unique Nash equilibrium, the first principle tends to dominate.
C) Explicit agreements may come about through a process of adaptive expectations.
D) Implicit agreements may come about through a process of backward induction.
E) Observing how others have played the game in the past should not provide affect a players current and future moves.