Glynnis has been involved in her college's theater department for several years. When she first gets a script she practices alone, repeating lines until they sound and feel realistic to her. She always notices that her performance improves significantly, though, when she participates in dress rehearsals with other actors. This is most likely due to

Asocial norms.

Bsocial roles.

Cdeindividuation.

Dsocial facilitation.