The correct answer is B.
The right of freedom of speech, guaranteed by the First Amendment to the US Constitution, can be limited by the goverment under very specific circumstances. Such was established in the landmark decision, reached by the US Supreme Court in 1919 in the case Schenck v. United States
Some activists were convicted during WWI because they were handing out fliers, to draft-age men, encouraging them to resist and to obstruct such procedure. The Supreme Court justices considered that such actions posed a clear and present danger on national security, explaining that the circumstances of wartime imposed greater restrictions on free speech than if compared to peacetime, because of the threat of greater dangers.