A train was supposed to arrive at a $$MRT$$ station at $$5:30 \rm pm.$$ But the train arrived half an hour early because of a traffic accident and changed another line. What time did the train reach the $$MRT$$ station? (adapted from 2008 Math kangaroo Problems, Level 3-4 , Question \#6） 
选项为:A:$5:00$ pm  B:$4:30$ pm  C:$4:00$ pm  D:$5:30$ pm  E:$4:40$ pm  请回答其中一个选项.