The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively__________________?

• A. zero and zero
• B. 0.5 kg/cm2 and zero
• C. 0.5 kg/cm2 and 0.5 kg/cm2
• D. 1.0 kg/cm2 and 0.5 kg/cm2