Question

a major event that took place in the united states in 1979 was
an energy crisis.
the creation of a us national bank.
a second oil embargo.
the creation of an oil cartel.

Explanation:

• The US national bank was established in 1791, not 1979.
• The first oil embargo was in 1973; the 1979 event was an energy crisis driven by Iranian Revolution-related oil supply disruptions, not a formal second embargo.
• The OPEC oil cartel was founded in 1960, not 1979.

Answer:

an energy crisis.