From the truth table, simplifying the 4 variable function using Karnaugh Map grouping. A B C D Output 0 0 0 0 1 0 0 0 1 0 0 0 1 0 1 0 0 1 10 0 1 0 0 1 0 1 0 1 1 0 1 1 0 0 0 1 1 1 1 1 0 0 0 0 1 0 0 1 1 1 0 1 0 1 1 0 1 1 1 1 1 0 0 0 1 1 0 1 0 1 1 1 0 1 1 1 1 1 1 OAC+A'D + AB D + BCD OAC+A'D + ABD + ABC OAC+ A'D' + AB D + C'D' OAC+ AD + AB D + C'D' O AC + AB D+A BD+A CD + A'B'D + How many gate changes would be required to convert a 32-bit Full Adder to a 32-bit Full subtractior? O 32 O 33 O 34 O 38 O 42