A phone survey conducted in the city of Long Beach, CA, reported that a greater proportion of nonsmokers endorsed a ban on smoking in alcohol-serving establishments than did smokers. What type of study design was this?

cross sectional study design                            

Explanation:

The cross-sectional analysis in scientific investigation, sociology, and biological instance is a form of experimental study that analyses information from a community, or a particular portion, at a particular time stage— which is, cross-sectional results.

The use of regularly gathered data makes it possible to conduct broad cross-sectional analyses at very little cost. Natural improvement has been proposed from inexpensive cross-sectional analyses with regularly gathered data indicating hypotheses, to situation-control experiments examining them more precisely, then to longitudinal trials and research costing considerably further and taking far longer, but which can offer better proof.  

the answer is c, the development of reading and writing in young children