Final answer:
The primary benefit of continuous integration in HRIS implementation is the early identification and resolution of problems, leading to a stable and reliable system. (option B)
Step-by-step explanation:
The primary benefit of the continuous integration approach when implementing a Human Resource Information System (HRIS) is that most problems can be identified and fixed as they manifest themselves. Continuous integration allows for ongoing testing and development, meaning that components of the HRIS are integrated and tested on a regular basis rather than at the end. This means bugs and issues are likely to be discovered and resolved earlier in the development process, leading to a more stable and reliable system upon completion.