Answer:
The correct answer is letter "E": meeting system.
Explanation:
An Electronic Meeting System (EMS) is a form of a networking-based group in which its members are connected through computers so they collectively can take decisions, solve problems, discuss over certain topics, and provide anonymous valuable feedback. EMS is used as a meeting platform for large entities with centralized decision-making but a presence in different regions around the world.
EMS disadvantage is relying on different internet connections for the meeting. If one of them is not stable the meeting is likely to be interrupted frequently.