Answer:
Generate a discovery
Explanation:
Hannah's research generated the discovery that participants who got more sleep were safer drivers. The discovery was done by manipulating the participants' sleep patterns. She then tested their driving ability.
She did not replicate any research as the research was only hers, neither did she solve a developmental problem nor changed the behavior of many people. She simply stated a fact based on the results of her research and it's up to individuals to put the conclusions of the test into practise.