please write a detailed explanation for the answer

Driver Script: another MindBlower.py x = 6 y = 2 doIt (x, y) Functions: A, B, dolt def A(a): y = a + 1; y += 1 return y def B(a, b): y = A(a); y = b + 1 return y def doIt(x, y): val = A (Y); y = B(y, val) print (x + y) Following the execution of the driver program, what output is produced to the screen: a) 7. b) 9. c) 11. d) A compilation error will be generated. None of the above. Indicate your correct answer here: Detailed Answer Explanation