Martha hired Dave to prepare her tax returns for 2017. Dave forgot all about the retainer and failed to file the returns at all. Were Martha to bring legal action against Dave, her best cause of action would be: Select one: O a. to sue for breach of fiduciary duty. O b. to sue based on negligent misrepresentation. Oc. to sue for failure to follow the Code of Conduct. O d. to sue for breach of contract