Mark the letter A, B, C, or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.
It is undeniable that instrument innovations hit the right note in 2013 with the 3D-printed guitar, the AT-200 guitar, the seaboard grand and the wheel harp.
A. growth
B. modernnisation
C. revolution
D. stagnation