In the following sentence, some parts have errors and some are correct. Find out which part has an error and mark it as your answer. if there is no error mark 'option E'.

I would be a millionaire now(A)/ if I have taken that job.(B)/ This is a fact that I will always (C)/regret and it will haunt me. Financial decisions should be made while thinking of the long-term prospects. (D)/ No error (E)