Users need to be able to make use of , such as rumors, unconfirmed reports, and stories, when solving problems.
a. interfacing data
b. informal information
c. formal data
d. prescribed information

Informal information

Explanation:

The informal information system is employee based system design to meet personnel and vocational needs and to help in the solution of work-related problems. it also funnels information upward through indirect channels.

However, one of the most important reasons for why informal communication is critical to businesses is that it allows employees to give feedback to their superiors.

Thus, the informal or grapevine communication promotes social relationship among the participants. It helps to build up unity, integrity and solidarity among them and boosts up their morale. Grapevine or informal communication is faster than the formal communication.