To address the contradictory findings of high failure and success rates among small businesses in Soweto, Lunga should formulate a question that focuses on the specific metrics of success being used in the studies. Therefore, the most appropriate question would be:
What success metrics are being used in the studies of small businesses in Soweto?
This question would help clarify the criteria being used to determine success rates, allowing Lunga to better understand the reasons behind the differing results.