In a large business, the _____ Department makes sure that all the computer operations, mobile devices, and networks run smoothly.

A) Human Resources
B) Information Technology
C) Engineering
D) Personal Computing

The Information Technology (IT) Department is responsible for managing and maintaining all technological aspects of a large business, including computer operations, mobile devices, and networks. While other departments such as Human Resources, Engineering, and Personal Computing may use technology in their work, they are not primarily responsible for its maintenance and management.