Never understood him either sorry
Allegro is a term which refers to music and which means <span>you should play a piece at a quick tempo ad the word means happy.
There are many Italian terms which are used in music to explain or to show the speed or tempo of the music. Most of the terms in music are Italian because many important composers of early period were Italian.</span>
I'm confused... are you asking if this is the correct answer?
I would have to go with the first and last option, because they are the only ones that make sense to me.
Answer:
C... the main purpose of a suffix is to show what part of speech the word is...eg. noun or adjective