How did the spanish-american war affect us power in asia?
the war with the filipino rebels reduced us influence in asia.
the war made the us an important power in asia.
the war had little effect on us power in asia.
the war created opposition to the us in many asian countries.

I believe the answer is: The war made the US an important power in Asia.

Due to our victory in the Spanish-American War, united states managed to control several crucial ex-spanish Colony in South East Asia. This provide opportunities for united states to establish a millitary base in Asia and obtain a strategic trading route to distribute its product to Asian continent.

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.