Answer:
survey 100 randomly selected parents in a theme park
Explanation:
random selection.It is considered a fair way to select a sample from a larger population. (since every member of the population has an equal chance of getting selected).
i would chose a or b
you want to get the one person that have the most valubale commet so pick random coustimers i wouldnt pick d becuase you are probably going to get the same answer
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