B. Respect for diversity would be most useful when trying to understand negative nonverbal cues.
Nonverbal cues are an important aspect of communication, and negative nonverbal cues such as frowning, crossed arms, or avoiding eye contact can indicate that the person is not comfortable or is unhappy. To understand these negative nonverbal cues, it is important to approach the situation with respect for diversity. This means acknowledging and respecting differences in culture, background, and experiences that may impact nonverbal communication. By doing so, individuals can avoid making assumptions and stereotyping based on nonverbal cues and instead, seek to understand the person's perspective and feelings.