Answer: def add_integers(x, y): return x + y

## Explanation Option D is correct because it properly defines a Python function using the `def` keyword and returns the sum of the two integers using the `return` statement. Let's analyze each option: **Option A:** Incorrect - Uses `function` keyword instead of `def` keyword. Python uses `def` to define functions, not `function`. **Option B:** Incorrect - Uses `function` keyword instead of `def` and doesn't return the result. The function would execute `x + y` but wouldn't return anything. **Option C:** Incorrect - Uses correct `def` keyword but prints the result instead of returning it. The function would display the sum but wouldn't return it for further use in the program. **Option D:** Correct - Uses proper Python syntax with `def` keyword and returns the sum using `return` statement. **Option E:** Incorrect - Uses correct `def` keyword but doesn't return the result. The function would calculate `x + y` but wouldn't return it. In Python, functions must be defined with the `def` keyword, and to make the result available to the caller, you need to use the `return` statement. Without `return`, the function either returns `None` (if no return statement) or only prints to console (if using `print()`).

Author: Keng Suppaseth