In Vernonia School District v. Acton, the school district argued that

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a drug test was illegal under any circumstances.

no student could refuse to take a drug test.

drug tests were not given at random.

drug testing was necessary to protect all students

drug testing was necessary to protect all students

The correct answer is the last statement: drug testing was necessary to protect all students.

Explanation:

The Vernonia School District argued for the random drug-testing of athletes saying that it was important to protect all students of the school. It was an important action because according to the school there was an epidemic drug-use among students.

The school also argued that athletes were the leaders of this drug-use culture and that they were the most important ones to be tested since they were frequently in situations during sports when drug-use could cause harm to other people.