input: Text: Volpla By WYMAN GUIN Illustrated by DICK FRANCIS The only kind of gag worth pulling, I always maintained, was a cosmic one—till I learned the Cosmos has a really nasty sense of humor! There were three of them. Dozens of limp little mutants that would have sent an academic zoologist into hysterics lay there in the metabolic accelerator. But there were three of them. My heart took a great bound. I heard my daughter's running feet in the animal rooms and her rollerskates banging at her side. I closed the accelerator and walked across to the laboratory door. She twisted the knob violently, trying to hit a combination that would work. I unlocked the door, held it against her pushing and slipped out so that, for all her peering, she could see nothing. I looked down on her tolerantly. "Can't adjust your skates?" I asked again. "Daddy, I've tried and tried and I just can't turn this old key tight enough." I continued to look down on her. "Well, Dad-dee, I can't!" "Tightly enough." "What?" "You can't turn this old key tightly enough." "That's what I say -yud." "All right, wench. Sit on this chair." I got down and shoved one saddle shoe into a skate. It fitted perfectly. I strapped her ankle and pretended to use the key to tighten the clamp. Volplas at last. Three of them. Yet I had always been so sure I could create them that I had been calling them volplas for ten years. No, twelve. I glanced across the animal room to where old
  Question: What motivated the narrator to design the Volpla origin story as he did?
  
   (A) He enjoyed creating backstories for the creatures as part of the stories he told them
   (B) He did not want the creatues to feel like they did not have a rich history
   (C) The Volpla asked him to tell them their history, and when they guessed they were from elsewhere, he ran with it
   (D) Making them think they were aliens was part of preventing any traceable ties between them and himself
  Answer:<extra_id_0>.
output: <extra_id_0> Making them think they were aliens was part of preventing any traceable ties between them and himself<extra_id_1>