Some big shots know how to escape the law even after they violate it. It is, however, the ___________ who are more often apprehended and punished.

"Small fry" is a commonly used informal phrase that refers to people who are considered unimportant or minor in a particular context, especially compared to powerful or influential individuals. It often contrasts with “big shots” or “big fish,” making it the perfect fit here.

"Small fish" is close but not idiomatic enough here. Although "small fish" is sometimes used to mean lesser offenders, it's less commonly used in this specific idiomatic pairing. "Big shot and small fry" is a more common pairing than "big shot and small fish"

Tiny shot and tiny fish are not idioms or standard phrases in English.

Hence, option (A) small fry is the best choice for this question.