Answer: C) 2
The term 2 is really the same as 2*1 = 2x^0. Recall that anything (except 0) to the zeroth power is 1. So the rule is x^0 = 1 when x is nonzero.
Looking at 2x^0, we see that 2 is the coefficient here because it is the constant being multiplied with the variable term.
