If HE = 3p + 7, angle HEP=(4q+19 /, LP = 5p – 19, and angle lpe=(3q+7) /, find the values of p and q for which quadrilateral HELP is a parallelogram.
A. p = 18, q = 13
B. p = 13, q = 8
C. p = 8, q = 18
D. p = 13, q = 18