Use of electronic mail (e-mail) has been wide-spread for more than a decade. E-mail simplifies the flow of ideas, connects people from distant offices, eliminates the need for meetings, and often boosts productivity. However, e-mail should be carefully managed to avoid unclear and inap-propriate communication. E-mail messages should be concise and limited to one topic. When complex issues need to be addressed, phone calls are still best. 15. The main idea of the paragraph is that e-mail ____________.