Android主要的存储方式包括（） A: 文件IO B: SharedPreferences C: 数据库SQLite D: 容易因频繁分配内存而导致内存泄漏的对象，例如处理器Handler.线程池ThreadPool等

You are developing an application that will perform mathematical calculations.You need to ensure that the application is able to perform multiple calculations simultaneously. What should you do？（） A: Set the IdealProcessor property of the ProcessThread object. B: Set the ProcessorAffinity property of the ProcessThread object. C: For each calculation， call the QueueUserWorkItem method of the ThreadPool class. D: Set the Process.GetCurrentProcess（）.BasePriority property to High.