Compared to individual problem solving,with group problem solving:

A) Less time is required. 
B) Hostility is increased.
C) Productivity is increased.
D) ​There is less personal satisfaction. 

Productivity

A measure of the efficiency of production, often quantified as the ratio of outputs to inputs in a given time period.

Personal Satisfaction

The feeling of contentment or joy that arises from achieving something desired or valued by oneself.

Hostility

Feelings of deep-seated anger or aggression towards someone or something, often manifesting in antagonistic behaviors or attitudes.