【单选题】Real policemen, both Britain and the United States, hardly recognize any resemblance between their lives and what they see on TV - if they ever get home in time. There are similarities, of course, but...
A.
so that he can catch criminals in the streets
B.
because many of the criminals he has to catch are dangerous
C.
so that be can justify his arrests in court
D.
because he has to know nearly as much about law as a professional lawyer