Question: What can be used as a yeast dough incubator?

  Options: 
 A. Fill a hot water bottle with hot water and place it on a pillow. Place your dough bowl in a plastic bag on top. Cover with a tea towel and a blanket.
 B. Fill a water bottle with cold water and place it on a pillow. Place your dough bowl in a plastic bag on top. Cover with a tea towel and a blanket.
Answer: A