Keyboard Setting and Accidentals

On a piano keyboard, the white keys specifically represent

• A.a factor entirely unrelated to representing the natural notes A through G
• B.only the notes belonging to a single, specific major key, with no other note
• C.the natural notes of the musical alphabet, from A through G
• D.exclusively the sharps and flats found between the natural notes

A sharp applied to a note already raised by the key signature specifically would, in effect, raise that note by

• A.no additional amount at all, since a sharp cannot ever be applied to an already-raised note
• B.a further semitone beyond the key signature's own effect
• C.exactly the opposite amount, lowering the note back to its own original, unaltered pitch
• D.a factor entirely unrelated to raising the note by a further semitone beyond the key signature

The white key immediately to the left of a group of three black keys, on a standard keyboard, specifically always represents the note

• A.G, a note found elsewhere on the keyboard, rather than to the left of three black keys
• B.F
• C.C, a note instead found immediately to the left of a group of two black keys
• D.a factor entirely unrelated to F being the note found to the left of three black keys