The deputy officer was charged with looking at over the files to find other evidence of wrongdoing
=> the answer is “B. looking at over” because we should omit “at”. The correct one is “The deputy officer was charged with looking over the files…(without “it”). Am I right? Many thanks.
Could you kindly explain more?
'To look at' and 'to look over' are both phrasal verbs with different meanings, you can't mix them in this way, '...looking at over...'
But the officer did "look at" the file.