Lydia wants to conduct a survey regarding her high school's uniform policy. Which technique would assure that Lydia's survey is well-designed and well-conducted? A. Lydia should randomly select a sample of students from the entire student population. She should then administer the survey to all of the randomly selected students. B. Lydia should choose her closest friends to represent the entire student population. She should then randomly select a group of her closest friends and administer the survey to her randomly selected friends. C. Lydia should randomly select one grade to represent the entire student population. She should then administer the survey to all students in the randomly selected grade. D. Lydia should select one grade to represent the entire student population. She should then randomly select students in the selected grade and administer the survey to the randomly selected students.