Lena says that 4xy^3 and -5x^3y are like terms. Is she correct? Why or why not?
A. Yes, because both terms have a variable with a power of 3 and a power of 1. B. No, because the two terms do not have the same coefficients.
C. No, because the same variables are not raised to the same powers.
D. Yes, because both terms have an x and a y.