Answer :
Increasing collaboration improves the effectiveness of decision-makers.
Option - a
Explanation :
A group support system is an interactive computer support system to aid decision making. It is a blend of hardware and software to enhance the quality of decisions through the participation of decision-makers using collaborative computing techniques.
The data can be shared mutually and thus opinions can be voiced and thorough deliberation the decision-makers arrive at a decision which seems more reliable as it is a result of cooperation and collaboration. The decision is also rational and more effective in comparison to the one made by a single decision-maker.