In Franz Kafka's The Metamorphosis, the Gregor Samsa (protagonist) wakes up to realize he has turned into a cockroach-like vermin while he was sleeping.
In real life, Kafka had many jobs but was never a traveling salesman himself. His father, however, worked as one before meeting Franz mother. In the story, Gregor sister grows to despise him, which is not an accurate representation of his sisters' feelings for Kafka. However, the author's relationship with his over-demanding father shaped his whole life and literary work, which explains the low self-esteem the Gregor experiences throughout this short story.
Therefore, your best answer is A.