Fill in the question tags. You didn't take those cans to the recycling bank,

Step 1: The main clause 'You didn't take those cans to the recycling bank' is negative and uses the auxiliary verb 'did' (in its negative form 'didn't'). Step 2: The question tag should be affirmative and use the same auxiliary verb. Step 3: The pronoun is 'you'. Thus, the correct tag is 'did I'.

c. did I