Your answer is A, input device.
Explanation:
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In SQL (Most widely known database), you use keyword 'SELECT' to get the information from the database. You then use 'WHERE' clause to filter the data you want to retrieve by introducing conditions to the Structure Query you are calling from the Database.
Answer:b) Non-repudiation
Explanation: Non-repudiation is the factor that ensures that the user cannot deny something they have received or gained. This property makes sure that the authenticity is maintained by creating the security with assurance.
The user receives or sends the data with the private key/ signature that makes sure about the activity that user has done. Other options are incorrect because they don't provide the assurance without the denying .Thus, the correct option is option(b).