For Jean to develop self-confidence, she should ________.

A) learn to rely mostly on intuition
B) develop a base of knowledge for problem solving
C) use enough negative self-talk to appear humble
D) downplay acquiring a lot of facts

Developing a base of knowledge for problem solving can increase self-confidence because Jean will feel more prepared and capable of handling situations. Intuition can be helpful, but relying on it alone may not provide enough assurance. Using negative self-talk can actually decrease self-confidence, and downplaying facts can lead to insecurity and a lack of confidence.