Answer:
A. "In the absence of a specific showing of constitutionally valid reasons to regulate their speech, students are entitled to freedom of expression of their views. As Judge Gewin, speaking for the Fifth Circuit, said, school officials cannot suppress 'expressions of feelings with which they do not wish to contend.'"
Explanation:
In this excerpt, the speaker tells us that a specific showing of constitutionally valid reasons to regulate speech was not found. This shows the importance of precedent. The doctrine of precedent is the idea that judges must inform their decisions by studying past judicial decisions. In this case, the fact that there was no precedent that could justify the regulation of speech means that the judges could not conclude that the regulation of speech had a legitimate constitutional basis.