Answer:D)Format string attack
Explanation:
Format string attack is the type of attack that causes to change the application functioning .This attack access the memory of the string library. It occurs while the submission of the string as input and then gets tested due to application command.
Other options are incorrect because these are the attacks that don't happens in the application for the alteration of the flow. Thus, the correct option is option(D).
There were 
balls but we took 
balls out, so there are now 
balls. We add 
balls and now we have 
balls.
The program that computes this (I will use python as language has not been specified is the following):
n, a, b = int(input()), int(input()), int(input())
print(f"There are {n-a+b} balls in the box")
# Hope this helps
D, save the file in multiple formats at the beginning
