Answer:
The answer to this question is DVD and DVD-RW
Explanation:
Answer.
1.Surge protection board
2.Uninterrupted Power Supply (UPS)
Explanation
A surge protection board is designed to protect equipment against a power surge or over voltage in power supply.A UPS provides back up power in occasions of power outage.In most events of power cut,UPS units only allow a person to save the work and perform a controlled shutting down of a computer.
I think the answer is C
hope this helps :)