Tom Robinson cannot accuse Mayella Ewell of lying because Everyone knows she is honest
He doesn’t want to offend she personally
She is telling the partial truth
It would break an unspoken code

It would break an unspoken code

Explanation:

The question above is related to the story entitled "To Kill a Mockingbird." The situation was in the trial room where Tom Robinson (a black man) was careful of not accusing Mayella Ewell (who was white). This is because there were laws that made the white people more powerful than the black, even when it comes to the courtroom. This was considered an "unspoken code." Thus, he was very careful not to go against it or he might face harsh consequences.