The correct answer is C. Metamorphic rocks.
Sedimentary rocks are formed from the accumulation of sediment, which is material that has been weathered and transported from one place to another. Igneous rocks are formed when magma or lava cools and solidifies. Metamorphic rocks are formed when existing rocks are subjected to heat and pressure, which causes them to change their physical and chemical properties.
Foliated structure is a type of texture that is common in metamorphic rocks. It is caused by the alignment of minerals in the rock in a particular direction. This alignment can be caused by the pressure that is exerted on the rock during metamorphism.
The other options are incorrect because they are not types of rocks that are commonly associated with foliated structure. Sedimentary rocks are not typically foliated because they are not subjected to the same level of heat and pressure as metamorphic rocks. Igneous rocks are also not typically foliated because they are not formed from the alignment of minerals.