The correct answer is: Only assumption I is implicit.
The statement says that the head of the organization congratulated the entire staff for their sincere effort to bring down the deficit and urged them to give their best for attaining a more profitable position in future. This means that the head of the organization is satisfied with the staff’s performance and wants them to continue working hard.
Assumption I is that the employees may get motivated and maintain and if possible enhance their present level of work. This is a reasonable assumption, as the head of the organization has congratulated the staff and urged them to continue working hard.
Assumption II is that the employees may now relax and slow down in their day to day work as there is no immediate threat of huge deficit. This is not a reasonable assumption, as the head of the organization has urged the staff to give their best for attaining a more profitable position in future. This means that the head of the organization expects the staff to continue working hard even though the deficit has been brought down.
Therefore, only assumption I is implicit.