A worm is at the bottom of a well with a depth of $$11$$ metres. If it climbs up $$3$$ metres in the day and slips down $$1$$ metre at night, how many days will it take the worm to climb up to the ground? 
选项为:A:$$8$$  B:$$7$$  C:$$6$$  D:$$5$$  E:$$4$$  请回答其中一个选项.