Dennis Galvan works as a campaigner at Green Earth, an environmental organization. Every month, his organization arranges a team outing where they play disc golf, soccer, and participate in relays and other team-building activities. The human resource department ensures that there are regular interactions between employees through team dinners and cultural events. According to the information given in this case, which of the following is most likely to be the reason for Galvan's high level of satisfaction toward his job?
A) salary packaging
B) promotion and growth
C) constructive dismissal
D) social environment
E) profile of work