Question 7 of 10 Three of the following instruments are very common to bluegrass, folk, and
COuntry music. One is less common and was introduced to these styles later.
Which is the following is least common?
OA Steel guitar
O B. Fiddle
OC. Mandolin
OD. Banjo

It depends on what type of third separates the three notes.for example: if you have two mayor thirds is an "aumented chord"if you have two minor thirds is an "diminued chord"if you have one mayor first and then one minor is a "mayor chord"and inverted is a "minor chord"