What is mensuration? please help me. A. A system for indicating the rhythmic relationships between notes.
B. A system for helping monks remember chant melodies.
C. A system for indicating the picture relationships between notes.
D. A system for indicating the relationship between notes and lyrics.

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.