A snail is climbing up from the bottom of a $15$-meter-deep well. It climbs up $3$ meters during the daytime, and slides down $1$ meter every night. How many days will it take to get out of the well? 
选项为:A:$$5$$  B:$$6$$  C:$$7$$  D:$$8$$  E:$$9$$  请回答其中一个选项.