Why do numA and numB have the same scope in the subtract function?

def subtract(numA, numB):
return numA - numB

def divide(numC, numD):
return numC / numD

answer = subtract(24,6)
print (answer)
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CHOICES
Only the subtract function can use or change the values of numA and numB.
numA and numB are both numeric.
numA and numB are similar names.
numA is passed the value 24 and numB is passed the value 6.