A society consists of only two types of people fighters and cowards. 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/