Answer:
the 1st and foremost reason was that if USA openly attacked the north Vietnam, the secret would be a secret no more and the whole world will realize about the plan of USA to curb the spread of communism even through military interventions!
secondly, there was the risk of Chinese intervention if USA engaged in direct conflict with North Vietnam. and this was a scenario that many US Presidents was unwilling to take as it could have had many negative reaction from the international towards USA.
Explanation:
Answer:
The costs of passing a bill that prohibits child labor is precisely that all the labor that children could have provided for the economy is forgone. So in pure economic terms, there is a loss of value, a sunk cost.
However, the benefit is both economic, and social. The economic benefit is that children will instead go to school, and educate themselves to become more productive workers in the future. And the social benefit is a fairer society, and wealthier too.
The primary problem was inflation