The topsoil layer has the greatest concentration of organic matter. the subsoil generally lacks organic matter, but it does receive small clay particles and dissolved ions that wash downward from the topsoil. the c horizon is made of materials weathered directly from the parent material, which lies immediately below. the parent material is either solid bedrock or a layer of sediment. based on this information, a. all three of these layers should have the same texture. b. the subsoil likely has a rockier texture than the topsoil and c horizon. c. the topsoil likely has a rockier texture than the subsoil and c horizon. d. the c horizon likely has a rockier texture than the topsoil and subsoil.