Answer:
Slow growth in productivity
Step-by-step explanation:
During the 1970s and early 1980s, the American economy suffered from high inflation and a decrease in productivity, mainly caused by a reduction of oil supply especially from Arab nations and an increase in its price.
Many industries that used oil as a major resource (e.g. automobile manufacturers, distribution companies, etc.) suffered greatly and their productivity lowered.
Since oil is a major resource, the negative effects of a supply reduction grew like a snowball and eventually affected the whole economy.