What is Contact time?

• A. It is the time takes for the cement column to move past any point in the annulus in laminar flow condition
• B. It is the time takes for the cement column to move past any point in the annulus in turbulent flow condition
• C. It is the time takes for the cement column to move past any point in the annulus in laminar or turbulent flow condition
• D. It is the contact time of the cement and the annulus