1 degree Celsius is the body temperature that can be reached when the human body has a fever. Not long ago, researchers exposed skin cells in test tubes to the air at 41 degrees Celsius twice a week for one hour each time. They found that these cells were not damaged, but instead The vitality is more prosperous. They speculated that moderate heat can extend lifespan, anti-aging, and beauty effects. Which of the following cannot be called into question:. ["People who often get colds don't live longer than normal people.", 'It is not the skin cells that affect the aging process.', 'Skin cells cannot replace all human cells.', 'A temporary rise in body temperature can cause damage to some cells in the body.']