Answer:
Natural minor
Explanation:
D Major would have an F# and C#, so it must be a minor -- d minor.
The relative major of d minor is F Major, so the key signature is b flat. There aren't any other accidentals, meaning it's not melodic or harmonic minor.
I think it's D. Sorry i wrong, im tired.
The answer would be a trumpet. it has the highest pitch in the brass section
