Choose a, b, c, or d that best completes each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.
_____ instructed me how to make a good preparation for a job interview.
John Robbins to that I spoke by telephone, John Robbins, that I spoke to by telephone, John Robbins I spoke to by telephone, John Robbins, whom I spoke to by telephone,