(APEX Help Please!) In which circumstance would the U.S. government most likely be able to constitutionally limit a citizen's right to freedom of speech?

A. A candidate for office harshly attacks his opponent and questions his competency.
B. A protestor rallies a crowd to break into a politician's home and destroy her property.
C. A comedian tells a joke that mocks the president's new plan to raise taxes.
D. A racist political activist delivers a speech insulting and belittling racial minorities.