The police still hadn’t enough __________ to prove him guilty．approach method conclusion evidence

The police still hadn’t enough __________ to prove him guilty．approach method conclusion evidence
The police still hadn’t enough __________ to prove him guilty．
approach
method
conclusion
evidence

The police still hadn’t enough __________ to prove him guilty．approach method conclusion evidence
应该选D.
意思是：警察仍然没有足够的证据证明他有罪.
应该选“证据”.

evidence [证据]