What is MD$5?$

A $$ A process that takes a block of data and creates a small fixed$-$sized hash

value that is $128$ bits in length.

B $$ A process that decrypts a block of data and creates a small fixed$-$sized

hash value that is $128$ bits in length.

C O A process that takes a block of data and creates a small fixed$-$sized hash

value that is $160$ bits in length.

D $$ A process that encrypts a block of data and creates a small fixed$-$sized

hash value that is $128$ bits in length.