Answer:
C: It must be short.
Step-by-step explanation:
Microblogging gives the opportunity to post and share messages with an audience online. It is specially used on the mobile web instead of using desktop web browsing, which makes the process slower and more complicated. Messages are short and they are in different formats such as text, audio, video, images or hiperlinks. The most popular social platforms, which allow users to communicate faster and easier with people online are Twitter, Instagram and Tumblr.