Which of the Following Is the Best Description of the Hypothesis-Experiment-Instruction

Which of the following is the best description of the hypothesis-experiment-instruction method?

A) The teacher provides a problem with several plausible solutions. Each student chooses one of the solutions, and there is a class discussion involving defending or refuting each alternative solution.
B) The teacher provides a problem and asks students to come up with the solution. The teacher provides the correct answer, and a student who got the correct answer stands up and defends it.
C) The teacher provides a problem with several plausible alternative solutions. The teacher lectures and provides a defence for the best alternative.
D) The teacher provides a problem and asks students to hypothesize about plausible alternative solutions. Students are rewarded for coming up with as many alternative solutions as they can.