In this section, there is a sentence with three underlined parts labelled (a), (b), (c). Read the sentence to find out whether there is any error in any underlined part and select your answer from the given options against the corresponding letter i.e., (a) or (b) or (c). If you find no error, your answer should be indicated as (d).
He came to report that the work went very slowly because the X-ray machine was not working very good that morning. No ERROR.
(a) (b) (c) (d)