1. it is musical sign raises the note by halfnote?
A.accidentals
B.natural sign
C.flat
D.sharp

2. another musical sign that lowers the note by half note?

A.accidentals
B.natural sign
C.flat
D.sharp

3. it refers to the musical symbols that cancel the effect of the sharp or flat?

A.accidentals
B.natural sign
C.flat
D.sharp​