Which of the following is an example of a 'progressive teacher's' approach to teaching a physical science concept?
ALecturing extensively on the laws of motion and requiring students to memorize definitions and formulas for an exam.
BAllowing students to design and conduct their own experiments to discover the principles of motion.
CConducting carefully pre-planned demonstrations of physical phenomena for students to observe and record their findings.
DProviding students with step-by-step instructions for a laboratory experiment to confirm known physical principles, focusing on accurate measurement.