According to the Center for the Study of Long Distance Relationships, 2.9% of married persons do not share a living space

Stage fright is more scientifically called __________

Fill in the blank with correct word

Billie received a series of email messages from an address with which she was not familiar. She tried to track down the sender, but could not determine who he or she was. The sender of these emails to Billie was using which common characteristic of mediated communication?

A. anonymity B. brevity C. immediacy D. frequency