Elaine Chamberlain works as a research executive at an environmental organization. Though her colleagues are helpful and friendly, because of her shy nature, she often eats her lunch at her desk and has limited interactions with them. She is glad that her nature of work does not require her to interact with her co-workers to a high extent. Which of the following types is Chamberlain most likely to be characterized as according to the Myers-Briggs Type Indicator (MBTI) classification? social extraverted exhibitionist gregarious introverted