Which statement best describes how temperature affects chromatographic separation?

Which statement best describes how temperature affects chromatographic separation?

• A. Higher temperature decreases mobile phase viscosity and improves mass transfer, often sharpening peaks and reducing retention times.
• B. Higher temperature increases mobile phase viscosity and slows mass transfer.
• C. Temperature has no significant effect on separation.
• D. Higher temperature always increases retention time.

Answer: (A)