What is the major key that has no sharps or flats?

The major key that has no sharps or flats is C Major. This key is recognized for its simplicity and accessibility, making it one of the first keys typically learned by music students. The C Major scale consists of the notes C, D, E, F, G, A, and B, played in ascending order, and does not require any accidentals.

This absence of sharps or flats means that musicians can easily read and play music written in C Major, as it aligns perfectly with the natural notes on a piano keyboard. In contrast, the other key options, G Major, D Major, and A Major, all have sharps in their scales. G Major has one sharp (F#), D Major has two sharps (F# and C#), and A Major has three sharps (F#, C#, and G#). Therefore, C Major stands out as the only key among the choices presented that features a completely natural scale with no accidentals.