I am pretty certain it is d
<span>The musical capital of Europe during the Classical Period was Vienna. During this time period, many great artists were discovered, such as Mozart. Composers like Mozart, Haydn and Beethoven were drawn to the city by citizens of Habsburgs who were willing to support the music.</span>
Answer: Public-domain is the answer
Explanation: Shareware, freeware, and public domain are software categories defined by how programs may be distributed, copied, used, and modified.