How should the Developer code the application?

An application under development is required to store hundreds of video files. The data must be encrypted within the application prior to storage, with a unique key for each video file.

How should the Developer code the application?
A . Use the KMS Encrypt API to encrypt the data. Store the encrypted data key and data.
B . Use a cryptography library to generate an encryption key for the application. Use the encryption key to encrypt the data. Store the encrypted data.
C . Use the KMS GenerateDataKey API to get a data key. Encrypt the data with the data key. Store the encrypted data key and data.
D . Upload the data to an S3 bucket using server side-encryption with an AWS KMS key.

Answer: B