You are conducting an important meeting in Brazil and several of the participants answer their cell phones throughout the presentation. The following is the best reaction:

Single out of the offenders and tell them they are being rude.

After the meeting tell the people who took calls during the meeting that you do not appreciate their inattentiveness and that they should turn off their phones next time.

Wait for each person to finish the conversation, then continue the meeting.

Continue with the meeting, ignoring the phone calls.