Final answer:
In Greek drama, both the principal characters and the chorus were involved in dancing, but it is not mentioned in the given text which group did the most dancing.
Step-by-step explanation:
In Greek drama, both the principal characters and the chorus were involved in dancing. The chorus was considered an integral part of the performance and shared in the action alongside the main characters. However, in later poets' works, the choral songs were less related to the subject of the play and more independent. Therefore, the amount of dancing performed by the principal characters and the chorus is not mentioned in the given text, and it cannot be determined which group did the most dancing.