Which landmark case ruled in favor of the school because the court believed the school had the right to prohibit students from displaying messages that promoted the illegal use of drugs?
a. morse et al v. frederick (2007)
b. hazelwood v. kuhlmeier (1983)
c. new jersey v. t. l.o. (1985)
d. tinker v. des moines (1969)

The correct answer is A. The landmark case that ruled in favor of the school because the court believed the school had the right to prohibit students from displaying messages that promoted the illegal use of drugs was Morse v. Frederick in 2007.

Explanation:

Joseph Frederick was a high school student from Juneau, Alaska, with a sense of humor. When the Olympic Torch passed through his school to Salt Lake City, he raised a humorous blanket that read: "Bong Hits for Jesus." The Court ruled that the principal of the school had the right to suspend him, which annulled the precedent established by the Court in the case of Tinker v. Des Moines (1969) that a high school student had the right to free expression and put on a black bracelet to protest against the Vietnam War.

The Court declared that part of a school's mission is "to educate students about the dangers of illegal drugs and to prevent their use." Therefore, it concluded that what motivated the actions of the director was a "serious and palpable" danger.