Suppose That XA Equals 10

Multiple Choice

Suppose that XA equals 10.What are the values for d₁⁺ and d₁⁻ in the following constraint?
XA + d₁⁻- d₁⁺ = 7

A) d₁⁻ = 0,d₁⁺ = 3
B) d₁⁻= 3,d₁⁺ = 0
C) d₁⁻ = 7,d₁⁺ = 0
D) d₁⁻ = 0,d₁⁺ = 7
E) d₁⁻ = 10,d₁⁺ = 3