You work as aplication developer at Cer-Tech.com. You have recently created an aplication that includes the code shown below.You now need to invoke the GetFileContents method asynchronously.You have to ensure that the code you use to invoke the GetFileContents method will continue to process other user instructions， and displays the results as soon as the GetFileContents method finishes processing. What should you do？（）

• A、A
• B、B
• C、C
• D、D