exam please help!!

The control unit of the processor, explained in class, contains the following circuit that generates the required control signals in each step of the operations: "Load", "Move", "Add" and "Sub". 1 T 2 i y2 2-to-4 decoder w wo En Clock Q. Up-counter Reset Clear If the processor is executing the operation "Add" then at the last step before completing "Add" we have: Select one: O a. To = 1 o b. T1 = 1 O c. T2 = 1 O d. T3 = 1