How is elasticity tested and how does elasticity level influence processing time decisions?

• A. Elasticity is tested by stretching a damp strand; if it stretches 60% or more before breaking, elasticity is high; processing time is not influenced.
• B. Elasticity is tested by rubbing the strand to see if it returns to length quickly.
• C. Elasticity is tested by stretching a damp strand; if it stretches 50% or more before snapping, elasticity is high; low elasticity suggests shorter processing times.
• D. Elasticity is judged by curl pattern of dry hair.

Answer: (C)