Vito is writing a coordinate proof involving a parallelogram. Knowing that the opposite sides of a parallelogram are congruent, Vito places his parallelogram on the coordinate plane such that one vertex is at the origin and one side lies along the x-axis. What coordinates should he assign to the fourth vertex of the parallelogram?

(2c+2b, 2a)

(2c+2a, 2b)

(2c, 2b)

(2a, 2c)
A parallelogram is in the coordinate plane so that one vertex is at the origin and is labeled 0 comma 0, another vertex is on the positive side of the x-axis and is labeled 2 c comma 0, another point is in the first quadrant and is labeled 2 a comma 2 b, and the last vertex is to the right of this point and is not labeled.