D Question 12 For an object to be Serialilzed it must have an/a O ICloanable interface O Cloanable Attribute O Serializable Attribute Inherit from abstract Serializable class O IEnumerable interface D Question 13 A delegate variable may be declared using the following syntax. O delegate void MDellint iv double dv: O Actioncint.double MDel: O Funcsint.double,char> MDel: O Predicatecint MDel; O delegate (lint xlI return x 2 O All of the Above O None of the Above D Question 14 Select the answer that is most correct. In C#, Generic Collections are restricted to the following data type(s) O valid C# scalar types only any valid C# data type. structs and/or classes O O simple objects