What is the correct answer?
4
A. [T₁ (T₂ - T₃)] / [T₃ (T₁ - T₂)]
B. [T₃ (T₁ - T₂)]/ [T₁ (T₂ - T₃)]
C. [T₁ (T₁ - T₂)] / [T₃ (T₂ - T₃)]
D. [T₃ (T₂ - T₃)] / [T₁ (T₁ - T₂)]