If p(x + y)2 = 5 and q(x - y)2 = 3 , then the simplified value of p2 (x + y)2 + 4pq xy q2 (x - y)2 is :

• A. (p + q)
• B. 2 (p + q)
• C. p + q
• D. 2 (p + q)