describing the character by giving details.
She kills herself because they couldn't be together anymore
It can best be described as the writer's opinion
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The Tet offensive proved that not only did the Viet Cong have the desire to fight back, but also the ability. It killed many US soldiers and set the war strategies back a bit. This added deeper conflict and dread to American fighters as well as American civilians.
b) novel
a novel is more likely than any of the other options