Final answer:
The best reason to implement a policy that places conditions on secondary employment for IT employees is to prevent conflicts of interest.
Step-by-step explanation:
The BEST reason to implement a policy that places conditions on secondary employment for IT employees is b) to prevent conflicts of interest. Secondary employment refers to having another job or working on side projects in addition to their primary IT role. By implementing a policy that places conditions on secondary employment, organizations can ensure that their IT employees do not engage in activities that could create conflicts of interest, such as working for a competitor or using corporate resources for personal gain.