If you managed to process through the Orientation question correctly (*cough* I didn't) then this one should have popped out right away; thank god it was answer A)! But here's how I eliminated all the others in review:
A) must be false because the Class 1 buildings can never end up in the same company's hands; they can only be traded for one another or two Class 2 buildings. This is also the case in A) in the Orientation question, which should have been eliminated.
B) Can be true if S trades L for M.
C) Can be true if S trades F for G.
D) Can be true if S trades F for KM from T.
E) Can be true if T trades KO for G from RP.
At least for this question, the designers had mercy to make the right answer the one on top.