Correct Answer: C
Explanation:
It has been brought out that the voters are looking for ways in which to make a certain type of system work again. The type of system is being described by the missing word. Since the system needs to be made working and accountable, it means that ‘functional’ is not the correct answer. Also, ‘responsible’ and ‘liable’ are unsuitable for the blank as they do not fit in with the message being conveyed by the remaining sentence. Therefore, C and E are the correct answers.