A Researcher Designs a Study That Tallies How Many Days

A researcher designs a study that tallies how many days the schoolchildren living in Illinois must stay inside at recess because of inclement weather. The researcher's intent is to generalize study findings to all public schools in Illinois, as a justification for a larger and better indoor multipurpose room for any new or remodeled schools in the state. What strategies on the part of the researcher would help achieve this level of generalizability? Assume that all schools in the sample will receive a copy of the plans for the study, with a statement emphasizing the possible benefits to the area schools through participation in the study.

A) The researcher will not allow any school to decline to participate in the study.
B) The researcher will select a large sample of schools randomly from all schools in Illinois.
C) The researcher will send a questionnaire to every school in Illinois.
D) The researcher will promise participating schools that they will be first in line for monetary rewards to enhance their schools' multipurpose rooms.
E) The researcher will choose 200 target schools in the state that average the highest percentage of instructional days affected by inclement weather.