I am not apparent on the last little bit in the sentence, "which just one is the best". I assumed it is analogous on the clause in "I'm gonna address whatever they are", the get of object plus the verb is reversed (I forgot exactly what the grammatical expression is), https://francisconwyss.is-blog.com/44096120/the-smart-trick-of-odor-control-cat-that-no-one-is-discussing