Help! I'll give you a medal!

Which sentence below shows correct use of em dashes?

Instead of another-trip her first-choice Jessica opted to take the shopping spree for her prize.

Instead of another trip – her first choice—Jessica opted to take the shopping spree for her prize.

Instead of another trip, her first choice Jessica, opted to take the shopping-spree for her prize.

Instead of – another trip her first choice – Jessica opted to take the shopping spree for her prize.

Question

Help! I'll give you a medal! 

Which sentence below shows correct use of em dashes?

Instead of another-trip her first-choice Jessica opted to take the shopping spree for her prize.

Instead of another trip – her first choice—Jessica opted to take the shopping spree for her prize.

Instead of another trip, her first choice Jessica, opted to take the shopping-spree for her prize.

Instead of – another trip her first choice – Jessica opted to take the shopping spree for her prize.

barrelracer011 · Answer

C I believe

anonymous · Answer

why do you say that ? @Barrelracer011

barrelracer011 · Answer

Because it doesn't make sense in any of the other answers.

anonymous · Answer

ok thanks. 
what about this one ? 

 (LC)Which sentence below shows correct use of an em dash?

I just watched The Lord of the Rings – my favorite film trilogy – with my friends.

I just watched The-Lord-of-the-Rings my favorite film trilogy with my friends.

I just watched The Lord of the Rings my favorite film-trilogy with my friends.

I – just watched The Lord of the Rings my favorite film trilogy with – my friends.

anonymous · Answer

is it c?

barrelracer011 · Answer

Yes I would say C