I could respond to that with "I'm going to assert my 5th amendment right and not answer that question" or "That was several months ago, I don't recall exactly w

I could respond to that with "I'm going to assert my 5th amendment right and not answer that question" or "That was several months ago, I don't recall exactly what I thought" or "Because it was near the end of the month and I believe that officers have quotas to meet" or "Because I'm black". All of that is moot. Where I live, there's no prosecutor involved for traffic tickets.