You are designing a script that may be imported as a module in other scripts. what variable can you use to check whether the script has been imported as a module, or is running as the main script?

Ibelieve the answer is: b.  use a different transition for every slide to keep the audience's attentiona. that would make it boringc. sound effects might be distracting and some people might find it annoyingi hope that : ) 

To expand his vocabulary & proof read 

Radiation energy hope it