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.
A is a soldier that it hired for pay by a foreign state is often referred to as a "mercenary" since they are simply hired to help the state in question carry out military objectives.
It’s victory against Carthage in the second century bc
Defeat the Persian empire
