Hot strength is seen at what temperature?

• A. Above 212¬¨¬®‚Äö√†√ªF
• B. Above 312¬¨¬®‚Äö√†√ªF
• C. Above 412¬¨¬®‚Äö√†√ªF
• D. Above 512¬¨¬®‚Äö√†√ªF