Question 3

For "the type of score you would expect to find under this uniform title: Beethoven, Ludwig van, 1770-1827. Violin, piano music,"you chose (b.) "A collection of sonatas, variations, etc., for violin and piano."

That is correct! A performance-medium uniform title, rather than a uniform title based upon a form name indicates that multiple forms are included in the collection (sonatas, variations, etc.).

Go on to question 4.