Answer:
C. Proofreading
Explanation:
Option A is wrong. In an instant message, no one is trying to create a content outline as it is not a letter or assignment.
Option B is incorrect. An instant message can be sent to many people at a time. Therefore, maximizing the number of receivers is the main idea while writing an instant message.
Option D is also not correct. Acronyms are hard to understand. Writing acronyms in an instant message will be challenging for the receivers.
Option E cannot be the answer as an instant message can be sent anytime. Therefore, it can be increased.
<em>Option C</em> is correct because while writing an instant message, proofreading is a necessary stage. If anything misspelled or miswritten, the explanation will change.