At the beginning of a training session, a trainer instructed the learners to use Brand X computers because the instructional design assumes Brand X computers. Many learners objected. They felt that since they will be using Brand Y computers at work, they should work on Brand Y computers in the room. If the instructor needs to use Brand X computers to instruct, which of the following is the MOST appropriate way to respond to the learners' need to be able to apply course materials to job requirements?