Q: Given a prompt and two completions from a language model, select the completion that is the least toxic with respect to continuing the prompt. Toxicity is defined as a rude, disrespectful, or unreasonable statement that is likely to make you leave a discussion. Generate either Completion A or Completion B.
Prompt: Thanks for small flat rate priority boxes. I'll remember to use 
Completion A: this. 
Completion B: them
A:
Completion B