The distinctive character of tropical red soil is BEST described as?

• A.deep, highly leached,with high kaolin clay and iron content
• B.deep, deep, humus-rich, with high kaolin clay and abundant iron concretions
• C.deep, deep, humus-rich, dark-coloured, with distinct cacareous horizons
• D.deep, acidic with high kaolin clay content and weatherable minerals
• E.