While a user reviews their email, a host gets infected by malware from an external...

Detailed Explanation:This scenario highlights the need for training on the secure use of removable media. Users should learn to avoid using untrusted external storage devices to prevent malware infections. Reference: CompTIA Security+ SY0-701 Study Guide, Domain 4: Security Operations, Section: " Removable Media Controls and User Awareness Training " ​​.