$.12$ reponses state the major$($main $)$ type of bias the occurs in the following study. a polling orgganization conducts a study to estimatimate the percentage of households that speaks a foreign language as the primary language. it mails a questionaire to $1023$ randomly selected householdsthroughout the united states and asks the head of the household if a foreign language is the primary language spoken in the home. of the $1023$ households selected $.12$ reponded