If x₁​ ,x₂ ,x₃ ,…,xₙ are the roots of the equation xᵃ −xᵇ =0, then the value of x₁ −x₂ multiplied by x₁ −x₃ is:
a) 0
b) xᵃ₁ - b
c) xᵇ₁ - a
d) 1