Which of the following systems of linear equations has no solution? (Lesson 4-13)

Multiple choice question.

A)
{x+y=6y=2x−3

B)
{x+y=9y=3x+2

C)
{y=2x−1y=2x+1

D)
{2x+4y=84x+8y=16

C) {y=2x−1y=2x+1

System of equations are poorly stated,

answer is poorly written