What does Mr. Lawrence insist on bringing into court to support his case against Denny?

In "The Art of Racing in the Rain," Mr. Lawrence brings a voice synthesizer into court to support his case against Denny. This is significant because the voice synthesizer is meant to manipulate and create a simulation of Denny's voice, undermining his credibility. The use of technology in this way plays into the themes of the story, highlighting how appearances and perceptions can be distorted—similar to Denny's struggles in the courtroom. By using the voice synthesizer, Mr. Lawrence attempts to cast doubt on Denny's character and decisions, which is a central conflict in the narrative. The other choices, while they refer to potential evidence, do not align with Mr. Lawrence's strategy of using the synthesizer to specifically target Denny's credibility and present a skewed portrayal of him.