The relationship between γsat, γd, γ and S is ______

• A. γ = γd*S[γsat-γd]
• B. γ = \(\frac{γ_d}{S[γ_{sat}-γ_d]}\)
• C. γ = γd+S[γsat-γd]
• D. γ = γd-S[γsat-γd]