If F is the factor of safety and Fᵢ is the frictional resistance, then the relation between them and tension Tᵢ in reinforcement is ________

• A. Fᵢ=Tᵢ F
• B. Fᵢ=\(\frac{T_ᵢ}{F} \)
• C. Fᵢ=Tᵢ+F
• D. Fᵢ=Tᵢ-F