"If the expiry date of a Cargo Ship Safety Equipment Certificate is May 01 , 2012, and the renewal survey is completed on Jan 20, 2012, which of the following is the validity of new certificate？
A.Jan 20.2012-Jan 19 2017
B.May 01.2012-Apr 30 2017
C.Jan 20. 2012-Apr 30, 2017
D.May 01. 2012-Jan 19 2017
正确答案是A