John works for Internal Computer Specialists, which focuses on helping small business owners resolve MIS infrastructure issues. John's tasks include cleaning and replacing motherboards, cables, and internal components such as DVDs and hard drives. What does John's role at Internal Computer Specialists focus on fixing?

Hardware.

Explanation:

All electronics devices like computer servers, DVDs, smartphones and cell phones, wrist watches etc, comes with two main components, they are hardware and software.

The hardware components are the physical part of the device, while the software component is the written instructions configured to the hardware for executing tasks.

Cleaning the motherboard in a computer system, fixing a DVD, servicing other internal components of devices are all hardware maintenance and repair services.

i think its d if im not mistaken

answerlibraries;