The right option is; C. made from the remains of living organisms
Organic sedimentary rocks are made from the remains of living organisms.
Organic sedimentary rocks are a type of sedimentary rocks that are formed from the build-up and lithification of organic materials (remains of plants and animals). They are formed under various degrees of temperature and pressure over long periods of time. Examples of organic sedimentary rocks include coal, and fossiliferous limestone.