question 13

A member of the county board of commissioners is interested in the level of support for adding more parks to her county. She learns that there are clear differences in support based on whether a citizen lives in the northern, southern, eastern, or western parts of the county Which of the following sampling methods would be best for measuring the true proportion of residents who support adding parks? Select one O B. A sample taken by posting signs near parks asking residents to call in to voice their support or lack thereof O b. A sample taken by selecting the residents closest to city centers in the county. O c. A cluster sample of residents taken with the clusters being city blocks in one of the county's major cities. O d. A stratified random sample of residents with the strata being regions of the county