You are developing a method to hash data with the Secure Hash Algorithm. The data is passed to your method as a byte array named message. You need to compute the hash of the incoming parameter by using SHA1. You also need to place the result into a byte array named hash.
Which code segment should you use?

A.
SHA1 sha = new SHA1CryptoServiceProvider();
byte[] hash = null;
sha.TransformBlock( message, 0, message.Length, hash, 0);

B.
SHA1 sha = new SHA1CryptoServiceProvider();
byte[] hash = BitConverter.GetBytes(sha.GetHashCode());

C.
SHA1 sha = new SHA1CryptoServiceProvider();
byte[] hash = sha.ComputeHash(message);

D.
SHA1 sha = new SHA1CryptoServiceProvider();
sha.GetHashCode();
byte[] hash = sha.Hash;