What is the simplified form of the expression (49p^2 - q^2) / (pq) / (7/p - 1/q)?
A) (49p^2 - q^2) / (7p - q)
B) (49p^2 - q^2) / (7p + q)
C) (49p^2 + q^2) / (7p - q)
D) (49p^2 + q^2) / (7p + q)