Answer:
A: 3β34=94
B: The difference of the integers 2 and 34 is not an integers, 94, which does not demonstrate that integers are closed under subtraction.
Step-by-step explanation:
A set is closed under subtraction means if you can subtract any two numbers in the set and still have a number in the set as a result.
For instance, the set {1,β1} is closed under multiplication but not subtraction.