Amy runs a lap around the track in $4$ minutes and Pawel in $5$ minutes. Amy and Pawel start to run around the track at the same time. After how many minutes will the boys meet at the starting point again? 
选项为:A:$$4$$  B:$$5$$  C:$$10$$  D:$$20$$  E:It depends on the distance around the track  请回答其中一个选项.