What is the large, wing-shaped bone on either side of the pelvis?

Which of the following is NOT a predisposing factor in developing necrotizing ulcerative gingivitis?

A) Being Caucasian B) Being African-American C) Smoking D) Physical stress

It is important to keep a daily ________ that lists mail received, follow-up correspondence needed, and the date it is completed.

Fill in the blank(s) with the appropriate word(s).