What do we mean when we say that "character is plot"? How does Kafka use this strategy in The Metamorphosis?

"Character is plot" means the problem that needs to be solved in the story is something happening to the protagonist himself/herself. Frank Kafka uses this strategy by turning his protagonist, Gregor Samsa, into a beetle, which prevents him from going to work as he is the sole breadwinner for his family.

- "the answers are a and b.  

when cullen speaks of planting while others reap, and standing "abject and mute," he is speaking about the racial injustices present in american society. as these injustices have changed over time, the american identity  has also shifted. those changes are, in turn, reflected in american literature."