A.C₆H₅COOH             B.C₆H₁₃COOH             C.C₆H₅CH₂COOH           D.C₇H₁₅COOH

A.C₆H₁₃COOH                         B.C₆H₅COOH

C.C₇H₁₅COOH                         D.C₆H₅CH₂COOH

胆固醇是人体必需的生物活性物质，分子式为C₂₇H₄₆O。一种胆固醇酯是液晶材料，分子式为C₃₄H₅₀O₂。生成这种胆固醇酯的酸是（　　）?

A.C₆H₁₃COOH                     B.C₆H₅COOH         ?C.C₇H₁₅COOH           D.C₆H₅CH₂COOH

A.C₆H₁₃COOH            B.C₆H₅COOH             C.C₁₇H₁₅COOH           D.C₆H₃COOH

A.C₆H₁₃COOH           B.C₆H₅COOH                C.C₇H₃₅COOH              D.C₆H₅CH₂COOH