The word culture has many different meanings. For some it refers to an appreciation of good literature, music, art, and food. ... However, for anthropologists and other behavioral scientists, culture is the full range of learned human behavior patterns.
C. a unifying element in family life...
This is because it is the only word listed above that relate to the rest of the question. Unifying means uniting aka bringing us together as the second part of the sentence states.
The answer would be Scholarly
I believe it is C. In writing, we can more easily conceal our attitudes.