Monique is factoring the expression 4x + 16xy. Her work is shown below. Factors of 4x: 1,2,4,x
Factors of 16xy: 1, 2, 4, 8, 16, x, y
GCF: 4x
Factored expression: 4x(0 + 4y)

Which best describes the accuracy of Monique's solution?

A. Monique's solution is accurate.
B. Monique made an error when listening the factors, which affected the GCF and the factors expression.
C. Monique made an error when determining the GCF from her list of factors.
D. Monique made and error when writing the factored expression.