Answer:
I think it is a, union wins battle of gettysburg.
Explanation:
because its definatly not c, or b and Andrew Johnson wouldnt lead to reconstruction.
The public school students' <em>silent</em> protest, by using <em>symbols</em>, in the form of armbands, during school time, cost the students a suspension, because it was considered a <em>violation of a school rule</em>. After the case had been judged by the Supreme Court, they finally won the case. But the outcome could be different, if their protest used "indecent speech" or promoted illegal drug use.