Which of the following shows that the term 'best practice' is vague? a) There are best practices in thousands of different areas. For example, there is best practice in accounting, best practice in marketing and so on. b) Since it needn't mean the single best, but could mean the few best practices, it is difficult to be precise about what procedures belong in the category of best practice. c) Unless it begins a sentence, 'best practice (in writing)' does not use capitalized letters, so best practice (in writing) is to not use capitalized letters. d) It could mean a team's greatest training session or an optimal professional procedure