Under what conditions on p and q, one of the roots of the equation x2 + px + q = 0 is the square of other?

• A. 1 + q + q2 = 3pq
• B. 1 + p + p2 = 3pq
• C. p3 + q + q2 = 3pq
• D. q3 + p + p2 = 3pq