Answer:
The correct answer is D) All answers are correct.
Step-by-step explanation:
In twentieth-century music it is not uncommon that string players use the wooden part of the bow to create a certain sound effect. Also an emancipation of dissonant sounds has taken place. The twelve-tone technique is one of the first examples of this emancipation. The use of percussion instruments often plays an important role in twentieth-century music. In many cases, pieces are written for instruments that are not typically used in classical musci such as african or latin american instruments.