A triad is constructed out of what notes?

A. root, third, fifth
B. base, third, seventh
C. first, second, fifth
D. root, second, seventh

A triad is a group of three notes that are all a 3rd apart. For example, in the G major scale , G and B are a 3rd apart and B and D are a 3rd apart. Together all three of these notes are a 3rd apart.