The study of our perception of odor and scents is known as __________

The term "sample point" refers to:

A. the point at which a survey reaches its prescribed margin of error. B. a geographical area that contains specific types of persons. C. the numerical point at which interviewers have obtained the necessary sample. D. the target population of a survey.

The ________ is a regular member of the group who engages actively in its discussions, but at the same time critically reflects the group's processes and needs.

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