Question: You are asked to write a function that will be called from main() to decrement the value of an int variable declared within the main

You are asked to write a function that will be called

You are asked to write a function that will be called from main() to decrement the value of an int variable declared within the main function. Which of the following could be a valid prototype for this new function? Select all that apply: void subtract one (int &); a. O b. void subtract one (int *); O c. void subtract one (int); O d. int subtract one()

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