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If you were to conduct a study to get student opinions regarding the difficulty of a stats class (100 students). Which one of the methods below give you a simple random sample?A) Select the first 20 names using the course rosterB) Randomly choose a discussion section and select all the students from that section.C) Randomly ask students who come to the office hour during the weekD) Randomly generate 20 numbers between 1 and 100, then use the course roster to select corresponding students.

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