Which Objective Function Has the Same Slope as This One

Multiple Choice

Which objective function has the same slope as this one: $4 x + $2 y = $20?

A) $4 x + $2 y = $10
B) $2 x + $4 y = $20
C) $2 x − $4 y = $20
D) $4 x − $2 y = $20
E) $8 x + $8 y = $20