kathi wants to better understand the eating habits of american teenagers. in order to do so she poses as a high school cafeteria worker and watches the activity of the teens as they eat lunch. she also unobtrusively videotapes the teens. which type of research is being conducted?

The center of gravity of a triangular solid with uniform thickness and density is the centroid and the point at which one can balance the triangle. The correct options among all the options that are given in the question are option "A" and option "C". I hope that this is the answer that has come to your great help.