Which of the following applies to the theory that there is a specific order or rank within which a person's needs are met, beginning with the basics of food, clothing, and shelter?

Which of the following guidelines correctly recognizes the importance of ease of access as well as ergonomics when administering PDL injections?

A) For maxillary teeth, select sites on the lingual because the embrasures are larger. B) For mandibular teeth, select sites on the facial for better access. C) Prevent blanching whenever possible to relieve hand stress. D) When blanching is observed circumferentially around the tooth, no more penetrations are necessary.

When referencing to the National Fire Protection Association color and number method, what number has the lowest potential for hazard?

a. 3 b. 2 c. 0 d. 1