A popular explanation/justification for a profitable strategy is being an early mover and gaining the "advantage" of being that early mover. Often misunderstood as the "natural" advantage of being the first in the market, there are specific circumstances under which being the first is a source of sustainable competitive advantage.

Which of the following are Early Mover Advantages?The other class of "mechanisms" listed below are impediments to imitation.Four of the seven following are "early mover advantages" and the other four, "impediments to imitation".

A. Learning Curve

B. Network Effects

C. Buyer Switching Cost

D. Reputation and Buyer Uncertainty

E. Legal Restrictions

F. Casual Ambiguity

G. Dependence on historical circumstances

F. Social Complexity

Give explanation also