The technician reminded them (a)/ to have a thoroughly clearing (b)/ of the machine after each use.(c)/ No error (d)

Read each sentence to find out whether there is any error in it. The error, if ant, will be in one there is no error, mark 'e' as your answer. Both of them genuinely helped (a)/ each other when their (b)/ families ware going (c)/ through a bad patch. (d)/ No error (e)