When a numeric variable is concatenated to a String, the entire expression becomes a(n) ____.

Tom sends out many e-mails containing secure information to other companies. What concept should be implemented to prove that Tom did indeed send the e-mails?

A. Authenticity B. Nonrepudiation C. Confidentiality D. Integrity

Every function includes a ____________________, which identifies it.

Fill in the blank(s) with the appropriate word(s).