Which of the following statements are true regardinghashing？ （）

• A、 MD5 produces a 160-bit result.
• B、 SHA-256 is an extension to SHA-1 with a longer output.
• C、 MD5 takes more CPU cycles to compute than SHA-1.
• D、 Changing1 bit of the input to SHA-1 changes 1 bit of the output.
• E、 SHA-1 is stronger than MD5 because it can be used with a key to prevent modification.