<span> The ramifications of the assassination led to the </span>Liberators' civil war<span> and, ultimately, to the </span>Principate<span> period of the </span>Roman Empire<span>.
Hope this helps. :)</span>
Explanation:
I think the question is wrong. Sorry if I am wrong!
But It should have been "You cannot get a refund ________ sale goods."
In this case the answer should have been ON.
Anyway the answer is ON.