Final answer:
The code segment sets variable x to 5 and then sets variable y to the sum of x and 3. The output of the code segment will be 8, which is the value stored in y.
Step-by-step explanation:
The question asks what the output of a specific Python code segment is. Initially, the variable x is set to the value 5. In the second line of the code, the variable y is set to the result of the expression x + 3. Since x equals 5, when we add 3 to it, we get 8. Therefore, the value stored in y after the second line of the code segment is executed will be 8. This means that the correct answer to the question is option a) 8.