The height of a seedling is $$7.2\text{cm}$$. It grows $$0.6\text{cm}$$ every day. What is the seedling\textquotesingle s height after $$3$$ days? 
选项为:A:$$1.8\text{cm}$$  B:$$7.8\text{cm}$$  C:$$8.4\text{cm}$$  D:$$9.0\text{cm}$$  E:$$9.4\text{cm}$$  请回答其中一个选项.