I feel like a different person when I am playing the piano I’m my room.
In my room
The right answer is a) Monotheism.
Judaism and Islam uphold prophets Muhammad and Abraham as paramount important figures in their respective religions; however the idea of God refers to one name (All'ah / Elohim). These two religions reject any additions to their single idea of God which remains a controversial topic with Christianity's Holy Trinity,
Nevertheless, Christianity is considered a monotheistic tradition as well even if its idea of God refers to three entities converging into one, namely, the father, the son, and the holy spirit.
Not unless they have a warrant