A newspaper in Los Angeles designs a survey to estimate the proportion of the city's adult residents who favor a proposal to legalize casinos in the city. It takes a list of the 1000 people who have subscribed to the paper the longest, and sends each of them a questionnaire that asks, "Do you think it is a good idea to legalize casinos in Los Angeles, which will broaden the tax base and contribute Angeles citizens are in favor of the proposal. Identify the following sources of bias money to education?" After analyzing results from the 50 people who reply, they report that 90% of the Los (a) Bias due to undercoverage. They do not use random sampling The few who take the time to responck might not be representative of the population The question frames the proposal in a positive way, which may skew the responses Not all parts of the Los Angeles population have representation. (b) Bias due to the sampling design They do not use random sampling O The few who take the time to respond might not be representative of the population The question frames the proposal in a positive way, which may skew the responses Not all parts of the Los Angeles population have representation. (C) Nonresponse bias. They do not use random sampling The few who take the time to respond might not be representative of the population. O The question frames the proposal in a positive way, which may skew the responses Not all parts of the Los Angeles population have representation.