What is the difference between passing by value and passing by reference?

• A. By value passes a copy of the data; by reference passes a pointer or reference to the original data so the function can modify it.
• B. By value passes a copy; by reference passes a pointer to the original data so the function can modify it.
• C. Both pass by value; only difference is syntax.
• D. By reference creates a new object; by value uses the original data.

Answer: (A)