The ____________________ serves as a collector of sound

All of the following post-exposure and prophylaxis measures are required by employers except:

a. prophylactic medication. c. laboratory tests to determine infection. b. counseling to exposed employees. d. modifying the exposed employee's patient responsibilities.

According to the grading system suggested by Haugejorden and Slack (1977), what is the most extensive class of proximal decay?

What will be an ideal response?