A researcher wants to conduct a study measuring factors that affect a healthy lifestyle among US residents, with study variables assessing daily diet, amount exercise per week and how many times per week an individual consumes fast food. The researcher decides to recruit a sample of participants to collect data from by standing outside a gym in a suburb of Los Angeles and asking people passing by if they would be willing to participate in her study and complete her developed questionnaire.

Would her chosen method of sampling be the best way to obtain a representative sample of her target population of all US residents?

a. Yes -- her chosen method would be the best way of obtaining a representative sample of US residents.
b. No -- her chosen method would NOT be the best way of obtaining a representative sample of US residents.