How is the decryption process carried out in identity-based encryption (IBE)?

How is the decryption process carried out in identity-based encryption (IBE)?
A . The sender provides the decryption key to the recipient.
B . The recipient generates a decryption key based on their private key.
C . The recipient’s email client automatically decrypts the email.
D . The sender’s email server decrypts the email before delivery.

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Answer: B