Which of the Following Is an Example of Hypothetical-Deductive Reasoning

Which of the following is an example of hypothetical-deductive reasoning?

A) Andrew draws his family tree and is able to understand that his mother is also a daughter,a sister,and a wife at the same time.
B) Paula solves an algebraic problem by making plans to solve the problem and systematically testing each solution.
C) Ann resolves a fight with her friend by offering a compromise,an approach that had always worked in the past.
D) Viola learns how to play the piano by observing her mother closely while she plays the instrument,and then practicing by herself.