$$\rm Bella$$從自己家向$$\rm Ella$$的房子前進．與此同時 $$\rm Ella$$ 騎車朝 $$Bella$$ 的家行進．她們各自保持恒定速度，且$$\rm Ella$$的速度是$$\rm Bella$$的$$5$$倍．她們的房子相距$$2$$英裏，即$$10560$$英尺，又知$$\rm Bella$$每步前进 $$2.5$$英尺．在她們相遇時$$B$$走了多少步？  Bella begins to walk from her house toward her friend Ella\textquotesingle s house. At the same time, Ella begins to ride her bicycle toward Bella\textquotesingle s house. They each maintain a constant speed, and Ella rides $$5$$ times as fast as Bella walks. The distance between their houses is $$2$$ miles, which is $$10,560$$ feet, and Bella covers $$2\frac 12$$ feet with each step. How many steps will Bella take by the time she meets Ella?．
选项为:A:$$704$$  B:$$845$$  C:$$1056$$  D:$$1760$$  E:$$3520$$  请回答其中一个选项.