Not sure if you're asking for the scale itself but i'll give it to you anyway.
D Major has 2 sharps. F and C.
Scale: D , E , F# , G , A , B , C# , D
It should be A. good luck
Proportion is the relative size of objects as compared to other parts of the piece. Balance is the arrangement of the elements within the piece that give it an aesthetically pleasing equilibrium for the observer.