Consider the following grammar and associated semantic actions. S-> ABCD { x = 1 * x + 1; } D->d{ x = 1 * x + 1; } C->cc{ x = 5 * x + 1;} B -> Bb { x = 3 * x + 1; } B-> b{ x = x + 1;} A ->gBa { x = 2 * x + 1; } The variable x is global-i.e., all semantic actions update the same x. Assume x is initialized before parsing to 0. What is the final value of x in a bottom-up parse of the following input string: gbbabbccd O a. 123 O b. 157 O c. 147 O d. 158 O e. 133