Topic: Fill in the Blank,

Best Answer Explained in Below-:

The sentence "I think my brother has ___ his friends badly and displayed selfishness for a long time." requires a verb that accurately captures the nature of the interaction between the brother and his friends.

The correct answer is **B) treated** because it conveys how the brother has engaged with or dealt with his friends. The phrase “treated his friends badly” implies that his actions or behavior towards them have been negative, aligning perfectly with the context of the sentence that mentions displaying selfishness. This suggests a pattern of behavior characterized by a lack of consideration for their feelings or needs.

The other options do not fit as well:

- **A) respected** would imply that the brother has shown regard for his friends, which contradicts the idea of bad treatment.
- **C) acted** is too vague in this context and does not specifically convey the negative nature of his behavior.
- **D) protected** implies a positive action, which does not align with the mention of selfishness.

Thus, "treated" accurately reflects the brother’s negative interaction with his friends.