Answer:
Bringing in emotions.
Explanation:
Maria has an emotional connection to car accidents that prevents her from listening effectively.
According to an article on Bright Hub Project Management, "Emotions erect barriers to effective communication. A listener's senses are not likely to be functioning at their optimum level when he or she is angry. Likewise, it is not possible to understand or appreciate what the speaker is saying if the listener is excessively sad."
Source: https://www.brighthubpm.com/resource-management/122339-effective-listening-10-barriers-and-how-to-overcome-them/
It think is that he was jealous so unferth tries to undermine him unjustly.
Keep in mind an adverb gives more information or describes further information on the verb, adjective, or other adverb.