How many organs were normally in a large church by the sixteenth century?

Which of the following best describes this composition?

a) it clearly relies on ritornello design b) although ritornello design is somewhat apparent, the work takes most of its style from sonata form c) it draws clearly on sonata form. d) its exhibits elements of both ritornello design and sonata form

In how many movements is Mendelssohn's Violin Concerto in E minor?

A. Five movements B. One long movement C. Three movements D. Four movements