What Is One Way in Which Researchers Have Studied the Construct

What is one way in which researchers have studied the construct of implicit self-esteem?

A) asking participants to estimate how others think about them
B) evaluating the speed with which participants can identify positive vs. negative words after being primed with first-person singular pronouns
C) measuring fluctuations in a person's self-reported esteem over the course of a week
D) asking experts to code people's self-esteem based on videos of them giving speeches