Answer:
B. As Thought Police they frame possible revolutionaries.
Step-by-step explanation:
The two men are both loyal members of the Party and are intelligent and determined in what they want to achieve.
They are members of the Thought Police and they are good at setting people up by being kind and generous to gain trust and eventually they betray.
They used this method to betray some people that let their guards down with them and discussed secrets with them.