A vassal was paid for past services.....
Lincoln said a house divided can not function the house being america and being divided by civil war<span />
If we're talking about the final nail in the coffin than I'd guess A. I'm fairly certain that Timur the Lame didn't invade Spain. Invasion was more of the Mongol's style than putting a figurehead on any throne. Correct me if I'm wrong based on what your resources say.
The answer is C, preserving the Union. Lincoln famously said, "If I could preserve the Union without freeing a single slave, I would."
The correct answer would be the first option, "<span>the production, distribution, and consumption of goods and services."
</span>