Final answer:
Wolfgang Amadeus Mozart's music was extremely popular all over Europe.
Step-by-step explanation:
Out of the given options, the musician whose music was extremely popular all over Europe was Wolfgang Amadeus Mozart (option A). Mozart was a composer and musician from the Classical period.
During his lifetime, Mozart enjoyed great success and popularity throughout Europe. His music was highly regarded for its beauty, complexity, and emotional depth. He composed a wide range of musical genres, including symphonies, operas, chamber music, and piano sonatas, among others.
His compositions continue to be admired and performed today, making him one of the most influential and beloved composers in the history of Western music.