All of the Following Are Activities in the First Step

All of the following are activities in the first step in the design of a questionnaire EXCEPT _____.

A) clarify the nature of the research problem and objectives
B) develop research questions to meet research objectives
C) define target population and sampling frame
D) decide on the grouping of the questions and the overall length of the questionnaire
E) determine sampling approach, sample size, and expected response rate.