According to Chapter 1, Your Career and Coding, which of the following is NOT one of an "ace" coder's skills?

By definition, the self-________ retractor works by a ratchet or other locking mechanism to hold the retractor blades in place in the surgical wound

A. steering C. retracting B. retaining D. closing

Which of the following foods contains reasonable amounts of fluoride?

A) milk B) wine C) tea D) coffee