The correct answer is option A and option C.
Metamorphic rock can either form from the sedimentary rock or igneous rock. They are formed when these rock undergo changes as a result of extreme heat and pressure.
The changes caused due to changes in the temperature and physical pressure which changes the mineral composition of the pre-existing sedimentary rock or igneous rock.
So, all the metamorphic rocks are formed from the pre- existing sedimentary or igneous rock.
