There Is a World in My Mind

"Who am I?" "Where do I come from?" "Where am I going?" Looking at the three major questions in life, Li Fusheng fell into deep thought, "Should I choose A, B, or C?" After deciding, Li Fusheng clicked on option D. The words "plain water" are clearly written on it, and the other three options are "red boiled water, green boiled water, and blue boiled water."