Answer: C) Crisis- mapping
Step-by-step explanation:
Crisis mapping gather all the information from different sources like e-mail, tweets and text messages.
It makes the information and data publicly available for use in many emergencies. it also analysis the data and display it during crisis.
The advantage of this method is that it basically increases the awareness among all the public so that they can easily report the information and improve the data management.
Therefore, Option (C) is correct.