1. was very popular during the romantic period. a. program music b. dynamic variation c. solo piano music d. all of the above 2. a harmony that sounds unstable is called a. dissonant b. pizzicato c. compound d. triadic 3. a string instrument can be played by a. drawing a box across the strings b. plucking the strings with the fingers c. tapping the wooden part of the bow on the strings. d. all of the above 4. which change was made to the piano in the romantic period? a. a sturdy wooden frame was added b. the range expanded to 96 keys c. the sustain pedal was added d. it became smaller and more compact.