I can help you with 17! People can be nervous if they are in a situation where time isn't on there side, or when they are around someone they find attractive (a crush) and people can get nervous when they are in a competition and they want to succeed at whatever they are doing(like a sport for example)
Hope this helped a little!! :)
The CORRECT answer is the third person limited!!
a person should follow his or her oen heart even if it means disobeying rules or going against the rest of the groups