Which of the following was a tactic used by the US during the Vietnam War? spreading Agent Orange
disguising troops as the enemy
fighting guerrilla warfare
disguising troops as civilians

Spreading Agent Orange

Explanation:

Agent Orange was a herbicide used by the American military during the Vietnam War to eliminate forest and crops in Vietnam.  It was toxic used to kill unwanted vegetation and plants during the war. It includes the chemical dioxin, which proved to have caused health issues among the Vietnamese and servicemen (Americans) who served in the war.

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.