The locus of the orthocentre of the triangle formed by the lines
(1 + p)x - py + p(1 + p) = 0,
(1 + q)x - qy + q(1 + q) = 0,
and y = 0, where $$p \neq q$$, is

A

a hyperbola

B

a parabola

C

a nellipse

D

a straight line