The city council wants to find out if city residents would be willing to pay higher taxes for improvements to the city's parks.

which sampling procedure is most likely to give an unbiased report of the residents' opinions?

a.
the council randomly surveys people from a list of city residents.

b.
the council surveys a random selection of visitors to the city's parks.

c.
the council does a random survey of parents of children playing in the city's parks.

d.
the council randomly surveys employees of the city's parks department.