write in exponent form: 2x times 2x times 2x times 2x
A: Because these are like terms, we just add the coefficient's to get 8x
B: Because there are 4 factors of 2 and 4 factors of x, 2^4 times x^4
C: Because we only worry about the exponent on the variable: 2 times x^4
D: Because when you are multiplying with exponents, you would add to get 8 times x^4