Elmp vists the Sesame Street Park every Wednesday. If the 1st of January 2017 was Sunday and February has 28 days, what was the last date in March 2017 in which Elmo visited Sesame Street Park? 
选项为:A:28th March  B:29th March  C:30th March  D:31st March  E:None of the above.  请回答其中一个选项.