In the case of Tinker v. Des Moines, how did the justices defend the armbands students wore in public school? Please choose the correct answer.
A: The armbands were only worn by students for 30 minutes a day.
B: The armbands looked similar to the students' uniforms
C: The armbands were small enough that no one could see them
D: The armbands did not interfere with other students' learning