The two pieces of evidence that show the speakers in the story do not want to make contact with the "meat" are:
D. "'Unofficially, I advise that we erase the records and forget the whole thing.'" (Paragraph 35)
This line clearly indicates a desire to avoid contact with the sentient beings made of meat by suggesting that they should erase any record of their existence.
B. "'We studied them for several of their life spans, which didn't take long.'" (Paragraph 13)
This line conveys a dismissive attitude towards the sentient meat, implying that their existence is not worth further consideration or contact.
These two pieces of evidence highlight the speakers' reluctance to engage with the sentient beings made of meat.