Answer:
The description that best describes San Martin's leadership style is:
Planned for battles long in advance due to his experience fighting against Napoleon.
San Martin was a military leader and strategist who had extensive experience fighting against Napoleon's armies. He was known for his meticulous planning and preparation before battles, which allowed him to make informed decisions and anticipate his opponents' moves. San Martin was also skilled at training and motivating his troops, which contributed to his success in battle. His leadership style was focused on planning, preparation, and attention to detail, rather than impulsiveness or favoring powerful men over intelligent ones.