Read the excerpt from Roll of Thunder, Hear My Cry.
"Ah, man!" cried T.J. "It ain't none of my business." Then, after a moment's silence, he added, "I got too many worries of my own to worry 'bout Cassie Uncle Tomming Lillian Jean."
My temper almost flew out of my mouth, but I pressed my lips tightly together, forcing it to stay inside.
What motivates Cassie to keep quiet in spite of her anger?
Cassie is embarrassed by her behavior.
Cassie is afraid of getting hurt by T.J.
Cassie needs to stay friends with T.J.
Cassie needs to keep her plan a secret.
Cassie needs to keep her plan a secret.
The excerpt suggests that Cassie is motivated to keep quiet because she needs to keep her plan a secret. The phrase "My temper almost flew out of my mouth, but I pressed my lips tightly together, forcing it to stay inside" indicates that Cassie is angry, but is consciously choosing not to express it in order to maintain the secrecy of her plan.
To determine what motivates Cassie to keep quiet in spite of her anger, let's analyze the given excerpt from Roll of Thunder, Hear My Cry. In this excerpt, T.J. makes a dismissive comment about Cassie's concerns regarding Uncle Tomming Lillian Jean. This comment incites anger in Cassie, as indicated by the statement that her "temper almost flew out of my mouth." However, rather than outwardly expressing her anger, Cassie chooses to "press my lips tightly together, forcing it to stay inside."
From this, we can infer that Cassie's motivation to keep quiet is not because she is embarrassed by her behavior, afraid of getting hurt by T.J., or needs to keep her plan a secret since the given excerpt does not provide information about any plan she might have.
Therefore, the most likely motivation for Cassie to keep quiet is that she needs to stay friends with T.J. Despite her anger, Cassie chooses not to confront T.J. in order to maintain their friendship and avoid potential conflict.