She would like the cost estimate to be as accurate as possible because this might be her one and…

Your project sponsor has requested a cost estimate for the project. She would like the cost estimate to be as accurate as possible because this might be her one and only chance to secure the budget for this project because of recent cuts in special projects. You decide to use _______________.
A. Analogous estimating techniques
B. Bottom-up estimating techniques
C. Top-down estimating techniques
D. Expert judgment techniques