A combination circuit would be needed for security because if you had a strait circuit if any one of those sensors or the keypad was ripped off the circuit will now let the flow of electricity be possible but with a combination circuit it helps eliminate that problem because even if on flow path is cut off, other paths are still available <span />
The correct answer is Boolean logic.
Booleans are true or false statements.
An example of a while loop is:
while 1 < 5:
#do something.
The Boolean statement is 1 < 5 which evaluates to true because 1 is less than 5.
I hope this helps!
<span>1 X 25 + 1 X 24 + 1 X 23 + 0 X 22 + 1 X 21 + 1 X 20 thus your Answer is C</span>