Marcie and Alyssa Are Going to the Football Game This

Marcie and Alyssa are going to the football game this afternoon.Alyssa notices that Marcie is sitting at her computer,and she calls out to ask if Marcie is ready to go."Just a second," replies Marcie."I just want to tweet to everyone where we'll be." Because Alyssa knows a lot about social media,she knows that Marcie is:

A) sending e-mail messages to their friends
B) posting a message on Facebook
C) leaving voice mail messages on their friends' cell phones
D) using MapQuest to find out how to get to the football stadium
E) posting a message on Twitter