In NET 45,many Classes for Web Access,file Processing,networking,image Processing and More Have

Multiple Choice

In .NET 4.5,many classes for web access,file processing,networking,image processing and more have been updated with new methods that return ________ objects for use with async and await,so you can take advantage of this new asynchronous programming model.

A) threads
B) Task
C) Transient
D) Token