Which of the following terms can be combined in this expression? -13 - x/5 + 6.2y + 20.5x - 3/8y
A. -13 can be combined with 20.5.
B. 6.2y can be combined with 20.5.
C. 6.2y can be combined with -3/8y.
D. -x/5 can be combined with -3/8y.