Final answer:
The personal use of NCR's intranet is acceptable with supervisor approval and as long as it does not violate company policies or involve sharing confidential information.
Step-by-step explanation:
The subject of this question belongs to Computers and Technology. When it comes to using NCR's intranet for personal use on an occasional and limited basis, there are certain conditions that need to be met. First, the user must have supervisor approval (option a). Second, the usage should not violate company policies (option b). Finally, the user should not share confidential information (option c). Therefore, the correct answer is option d) Both a and b.