A person will exploit others with manipulation or deceit to achieve their own personal goals. Hope this helped.
P = 2l + 2w
P - 2w = 2l
(P - 2w)/2 = 2l/2
(P - 2w)/2 = l.
L = (P - 2w)/2.
I believe B is the correct solution.
The answer is True that the author's selections give unity to his novel.