Organum purum is most like which other style of polyphony?

What does the indication allegro ma non troppo mean?

A) slowly, gradually getting faster B) moderately and majestically C) fast, with fire D) fast, but not too much

What is a "cold reading?"

A. When an actor reads the script for the first time after being cast in a production B. When an actor improvises an audition C. When an actor prepares audition pieces before the audition D. When an actor reads scenes from the play in an audition with little or no time to prepare