Answer:
The answer is "Option b".
Explanation:
A data backup is a mechanism of generating a duplicate copy from your sensitive files and data like your photos, video clips, documents, and links, for example — so your data is safe and accessible when something occurs to your device, it would be the first to the provider of tough-to-replace data, and it is essential, but its recovery method must be safe, and other choices were wrong that can be described as follows:
- In option a, It does not require always, that's why it is wrong.
- In option c, It is wrong because data backup is necessary.
- In option d, It doesn't provide detrimental security, that's why it is wrong.