The tone of "Conscientious Objector" is:
d) defiant
The poem "Conscientious Objector" by Edna St. Vincent Millay expresses a strong sense of defiance and resistance. The speaker, who is a conscientious objector, refuses to conform to societal expectations and refuses to participate in war. The poem conveys a sense of standing firm in one's beliefs and principles, even in the face of pressure or opposition. The tone is marked by a resolute and unwavering defiance against the prevailing norms and the call to participate in war.