Jan Is Studying the Firing of Neurons in the Brains

Jan is studying the firing of neurons in the brains of rats as part of her dissertation research on memory. She is disciplined in her research process and in record-keeping and follows her advisor's recommendations to the letter, as she wants to eventually accomplish a lot in this field. The Big Five trait that best describes this aspect of Jan's personality is

A) openness.
B) extroversion.
C) conscientiousness.
D) agreeableness.