2 The police went ..... the bank robbers.

Step 1: Understand the context. The sentence describes the police's action in relation to the bank robbers.
Step 2: Identify the correct phrasal verb. 'Went after' means to pursue or chase someone.
Step 3: Select the option that completes the phrase. Option C, 'on', is incorrect. Option B, 'off', is incorrect. Option A, 'after', is the correct choice.
Answer: after