Answer:
d. Parallel start up
Explanation:
The parallel start-up implementation strategy is the best approach to introducing new software. In this strategy, both systems run simultaneously as the employees gain trust in the new software, and then a complete move can be made over to the new software. A direct cut-over means completely cutting out the old software and moving to a new one, which will not work well in this given scenario. Although the pilot start-up may be cheaper it does not involve all employees but a selected group that will use the new software together with the old one and then after a certain period implement a direct cut-over. The phase-in approach can prove difficult to implement in this scenario, as the software is implemented in phases, throughout the entire company.