Final answer:
Rock A is sedimentary, Rock B is igneous, and Rock C is metamorphic.
Step-by-step explanation:
Rock A is sedimentary because sedimentary rocks are formed by the deposition and cementation of sediments. The rounded grains and cemented texture described in the question are characteristic of sedimentary rocks.
Rock B is igneous because igneous rocks are formed from the solidification of molten magma or lava. The jigsaw-puzzle-like fit of the grains is a characteristic of igneous rocks.
Rock C is metamorphic because metamorphic rocks are formed from the alteration of pre-existing rocks by heat and pressure. The linear patterns and foliation described in the question are indicative of metamorphic rocks.
Rock D and Rock E cannot be classified without further information or observations.