Which statement about Champagne's departments is true?

• A. Marne is the smallest department in Champagne.
• B. Seine-et-Marne is not a department in Champagne.
• C. Haute-Marne is one of the five departments.
• D. Aisne is the only department listed.

Answer: (C)

The idea is identifying which departments are associated with Champagne. Historically, Champagne includes five departments: Aisne, Aube, Marne, Haute-Marne, and Seine-et-Marne. So, Haute-Marne being one of the five is true. The other statements don’t fit this set: Seine-et-Marne is actually part of Champagne, not excluded; Aisne is not the only department listed since there are four others; and claiming Marne is the smallest isn’t the defining fact used to describe Champagne’s departments.