Brooks,
I'm not a native English speaker but to me it sounds like a self fulfilling conclusion meaning:
"I'm gonna win, for I have the biggest engine, therefore fastest on the track."
That would make C. Beware the winner.

Niels

PS.
I don't know the exact context of how they expect one to reply, since both have only one thing that can be concluded non-speculative wise.
In my example that would the biggest engine and the other 'the fearless-behavior' since the rest is speculative...

[EDIT]
After reading it again, I assume the context is grammar, where the offset is, the whole expression is true and the reference to the conclusion is pointed by the word therefore (conclusion)