Definition: You are given a question on high school government and politics. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: A constitutional amendment would be required to ban flag burning because that activity is currently protected by the right to
(A)due process (B)assembly (C)free exercise of religion (D)free speech

D