A society consists of only two types of people - fighters and coward. Two cowards are always friends. A fighter and a coward are always enemies. Fighters are indifferent to one another. If A and B are enemies, C and D are friends, E and F are indifferent to each other, A and E are not enemies, while B and F are enemies.Which of the following statements is correct?

• A. B, C and F are cowards.
• B. A, E and F are fighters.
• C. B and E are in the same category.
• D. A and F are in different categories.