Unfortunately, a community pharmacy's computer system is down, so the pharmacy is not able to process prescriptions because _________.

A pharmacy with a computer system that is down will be unable to process prescriptions for many reasons. In this question, the best choice is there must be a record of who worked on a prescription. And, it would be difficult and easily overlooked to record who worked on the prescription if prescriptions were taken care of manually. The law requires this record to be maintained.