You add a button named btnDownloadTours to the search results page.
You create a method named DownloadTour to download video tours synchronously. DownloadTour receives a single parameter of type integer, representing the ID of a video tour. As customers add listings to their favorites list, the ID of the video tour is added to a collection named selectedTours.
You need to implement the code required to download the video tour based on the video tour requirements.
What code should you add to the Click event of btnDownloadTours? (More than one answer choice may achieve the goal. Select the BEST answer.)
A. Option A
B. Option B
C. Option C
D. Option D
