Afitness center employee wants to know how his members would feel about a rate hike to remodel the pool area. which sampling method will result in a sample that is not biased?

I had to look for the options and here is my answer.
Based on the experimentation done by a fitness center employee, the sampling method which would result in a non-biased sample would be by listing all the names of the employees and then calling every 15th of the member on the list. Hope this helps.