Which of the Following Researchers Most Clearly Illustrates Behavior Similar

Which of the following researchers most clearly illustrates behavior similar to that of an ethnographer who is studying gifted education?

A) Laurie conducts observations in several classrooms for one week each.
B) Mindy surveys the gifted students regarding their self-concept and correlates self-concept with their IQ score.
C) Len conducts a database study that compares the standardized test scores of students in pull-out gifted programs and those enrolled in advanced classes.
D) Dave observes in a single gifted classroom for the academic year.