Which one should be my pfp

Answer the question in the image! i just need 4s answer but is 3 is wrong correct me uwu

Which statement is true with regard to beethoven? a. ludwig vin kochel catalogued more than six hundred of his compositions. b. he was the official composer for the powerful and rich eszterhazy family. c. he produced the best piano sonatas and the “ninth symphony” after losing his hearing. d. he wrote the well-known opera “the magic flute” during the last years of his life.

Why do artist use texture? (site 1) !