Discovery-Based Science Allows for a New Way of Learning Why

Discovery-based science allows for a new way of learning why teens behave a certain way. Which reflects a discovery-based approach to this question?

A) Following the scientific method's procedures closely
B) Focusing on hypotheses and survey results
C) Surveying as many as possible (n=) minimum of 10,000 teens with a set of predefined questions
D) An open-ended interview with teens to understand the motivations and reasoning of their behaviors
E) Collecting data from teens in a stratified way