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

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.

drug testing was necessary to protect all students