In the Vietnam War, United States troops had the advantage of superior firepower. United States Air force or Artillary are highly strong and far better than Viet congress which gives Americans an upper hand during the Vietnam War.
The United States forces did have Strong firepower against Viet congress but they are far behind with local geographic knowledge of the terrain. This was one of the biggest reasons that the Viet congress army never let united states forces wins.
During Vietnam War, US troops had the advantage of superior firepower. The correct option among all the options that are given in the question is the fourth or the last option. The United States forces did have a superior firepower but they lacked geographic knowledge of the region. This was one reason that the Vietnam forces never let the US forces have a complete victory.
Countries that have "free-market" economy generally have better standards of living. It is an economy whereas it is dependent of supplies and demands. By no meaning it has no controls within the government.
