Answer: the best method she will likely use is to interview them
Step-by-step explanation:
A one on one interaction will be more effective and efficient in this case since Lauren is amongst these woman.
He can collect as much information as she requires as she may do this as she goes with her ordinary day .
She may even observe them as she interviews them which gives her the ability to even read their non verbal reactions which may add more to the information she gathers from their verbal response.