What does the Secure Hash Algorithm (SHA-1) create?

A.
A fixed length message digest from a fixed length input message

B.
A variable length message digest from a variable length input message

C.
A fixed length message digest from a variable length input message

D.
A variable length message digest from a fixed length input message

Explanation:
The Secure Hash Algorithm (SHA-1) computes a fixed length message
digest from a variable length input message.