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Leon and Sara are arguing over when the best time is to degrease soup. Leon says that it's easiest to degrease soup when it's boiling. Sara says it's easiest to degrease soup when it's cold. Who is correct?
A. Neither Leon nor Sara is correct.
B. Leon is correct.
C. Both Leon and Sara are correct.
D. Sara is correct.
Student Answer: B  
Answer: Incorrect
Which correct answer?