Final answer:
Darmstadt, Germany (option d) holds an annual summer school for new music that was influential in the development of total serialism and the use of electronic music.
Step-by-step explanation:
The correct answer is d. darmstadt, germany.
Darmstadt, Germany holds an annual summer school for new music that was influential in the development of total serialism and the use of electronic music. The Darmstadt summer courses, also known as the Darmstadt International Summer Courses for New Music, have been an important platform for avant-garde musicians and composers since their inception in 1946. The courses have featured renowned composers and performers, and have played a significant role in pushing the boundaries of contemporary music.