There's a bit of an oddity in Hostile Acquisitions, in relation to the Cold Trade Broker Alternate Career Rank.
First, it lists that Cold Trade Broker automatically gains the Enemy (Inquisition) Talent as "Special".
Then, as part of the "Benefits", it explains how the Cold Trader Trait allows one to choose whether to gain Enemy (Inquisition) or Enemy (Xenos) (as well as gain the benefits of either Peer (Xenos) or Hatred (Xenos) respectively).
I have the feeling the " Special: Cold Trade brokers automatically receive the Talent Enemy (Inquisition) " is simply a remnant of an earlier revision, before the Cold Trader Trait was finalized. Otherwise, the choice of the Cold Trader Trait really is no choice at all.