questionwhich of the following explains the context for united states economic development between 1950 and the early 1970s?responsescredit and stock markets became unstable because of overspeculation.credit and stock markets became unstable because of overspeculation.low unemployment encouraged american optimism about economic growth.low unemployment encouraged american optimism about economic growth.a powerful conservative movement halted federal economic intervention in the economy.a powerful conservative movement halted federal economic intervention in the economypanies imported valuable commodities acquired from new overseas colonial territories.