You need to register the SocialPoller background task in the constructor of the Page1 class.
Which statement sets the appropriate task entry point at line PG19?
A. builder.TaskEntryPoint = "Sreader.Background.SocialPoller";
B. builder.BackgroundTableStart = "SocialPoller.Ereader.Background";
C. builder.TaskStart = "Pagel.SocialPoller ";
D. builder.TaskEntryPoint = "Sreader.Pagel";