A writer is choosing the final sentence of a development paragraph. The passage introduces this situation: An online certificate program replaced some live lectures with recorded lessons that students could complete at any hour. The paragraph's claim is that asynchronous lessons can improve completion for students with caregiving duties when the course also provides structured participation prompts. Its cited evidence is: Completion rose among caregivers, but discussion participation initially fell; after weekly response prompts were added, participation returned near its earlier level. Which final sentence best connects the evidence to the claim?