This really was quite the cruel trick by the LSAT. I'm just going to use this space to lay out my process, in the hopes that it will stick the next time I'm up against the clock and a problem like this.
There are many trade options and only ONE of them has to be in the right answer. So focus on one of the companies, and see if anything illegal happened. I focused on RP just because it was first. Either RP has:
1) G and YZ as it started with (didn't trade)
2) F but NOT G (1-1 trade)
3) two of K/M/O but NOT G (1-2(2) trade)
4) L but NOT YZ (1-2(3) trade)
So many possibilities for an Orientation! Devilish.
A) is eliminated because RP can't have F AND G after one trade
B) is eliminated because YZ can't be traded for two class 2 buildings (K and O)
C) is....OK. Defer.
D) is eliminated because YZ can only be traded as a pair, so RP can't end up with M and Y together.
E) is...OK. No RP trade here.
So let's check on SC and T in answer C). T has its original cast, and S seems to have done the L-YZ trade with RP. That seems...ok. But this game is so wild I'm not confident! Check on E.
Somehow in E), S gave F, a class 1, away to T, and got only one class 2, O, in return. That looks like S got seriously ripped off; you can only trade a class 1 for another class 1 or TWO class 2s! Eliminate.
Is this a realistic process for a time crunch? In my case: hell no. I cut and run like a spooked animal. If there's a better and faster way to attack this Orientation, I'd love to know!