"Green River" ordinances require that

a$)$ all door$-$to$-$door salespeople post a $$1,000$ bond with city authorities before making sales call in the city

b$)$ all non$-$residents who attempt to sell goods or services directly to consumers be registered with city authorities and obtain a license to sell goods or services direct to consumers in that vicinity

c$)$ all salespeople with health problems obtain a validated health exam before being permitted to call on consumers in their homes

d$)$ all salespeople who seek professional certification submit qualifying credentials to Green River, Wisconsin for verification