The open door policy was designed to open Japan to American trade and influence (The US was hungry for an imperial puppet).
The hacker can either use R.A.T (Remote administor tool), Trojan, Or other malware to infect that computer. Also worm can infect other computers by spreading over the network
The tactic that Filipino insurgents use to undermine American power is: <span>C. guerilla warfare
Guerilla warfare is a warfare strategy where the troops are hiding within the terrains (usually they're familiar with the terrain) and obtain advantages toward the enemy using the element of surprise</span>
Rural people had farms and thus needed more workers so they just had a bunch of kids to help out. if the city they didn't need a bunch of kids.
In the days before World War II, all three countries were colonies/territories of other countries.
The Philippines was an American Territory.
Vietnam was a French Colony.
India was a British Colony.
Hope this helps!