In my opinion, it is better to put your funds into one year CD and then at matuerity to "roll out" another year.
You can also do the math: continuous compound by using 1 year rate to get three year rate (currently offered rate for 3year) to see which one is higher. Plus you should also take into account the risk of pre-mature penalty for 3yr... for 1 yr CD you could minimize this risk.
Thank you for reading.