A . IHE=“0”,ISE=“0”,IHB=“1”,ISB=“0”
B . IHE=“0”,ISE=“0”,IHB=“0”,ISB=“1”
C . IHE=“0”,ISE=“1”,IHB=“1”,ISB=“0”
D . IHE=“0”,ISE=“1”,IHB=“0”,ISB=“1&rdquo