Which of the following groups of features is normally associated with the old age of a river?

• A.Meaner terraces, point bars and knick points
• B.Point bars, U-shaped valleys and ox-bow lakes
• C.Meander terraces, point bars and natural levees
• D.Sand bars, terraces, knick points and natural levees
• E.Meander terraces, sand bars and steep gradients