Which principle of design is achieved by symmetry or asymmetry?

The second half of the eighteenth century witnessed __________

a) a tremendous growth in amateur music making at home b) a move back to the basics of Gregorian chant c) the downfall of Haydn's career d) the birth of opera

A gradual slowing-down of tempo is indicated by the term ________.

A. andante B. crescendo C. ritardando D. accelerando