Want a PowerPoint photo album slide show to play continuously?

Answer: Option C

To make a PowerPoint photo album slide show play continuously, you should select Option C: Loop continuously. This setting allows the slideshow to repeat automatically from the beginning after reaching the last slide, ensuring continuous playback.
Option A: Use random slide transitions is not directly related to continuous playback but rather affects the transition between slides.
Option B: Launch an online broadcast is unrelated to continuous playback within the PowerPoint application.
Option D: All of the above is incorrect because Options A and B do not contribute to achieving continuous playback of a photo album slide show.
Therefore, the correct answer in this context is Option C: Loop continuously.