Why should the architect recommend another solution?

A customer has hundreds of TB of data that they need to archive for 20 years. The customer will need to completely destroy the data. They will only to access the data once or twice during the 20 years. The data is very sensitive. It would be a serious security breach if anyone accessed the data during that time. The customer is considering NAS.

Why should the architect recommend another solution?
A . NAS will NOT meet the isolation and security requirements.
B. NAS will be to expensive compared to other satisfactory solution.
C. NAS storage mediums will degrade too much during the required 20 year of archive.
D. NAS storage will make complete data destruction impossible.

Answer: C