Please choose one drop down option. The second drop down box answers are "reliable and unbiased" and "questionable and biased", choose one. Thanks!

A popular animal blogger posted this question on their site: "How many times do you walk your dog on a given day?" Of the 886 subjects who decided to respond, 63% of them said "3 times per day." The sample is a [ Select ] V , the results are [ Select ] [ Select ] voluntary response sample simple random sample stratified sample systematic sample