Read the excerpt from president woodrow wilson’s speech, “war message to congress.”

i have called the congress into extraordinary session because there are serious, very serious, choices of policy to be made, and made immediately, which it was neither right nor constitutionally permissible that i should assume the responsibility of making.

which best explains why president wilson chooses the word “extraordinary”?
a. he is trying to call attention to the issue.
b. he thinks the nation will go to war.
c. he likes using diverse vocabulary.
d. he is apologizing for calling this session.