What event caused the United States to slow its construction of nuclear power plants in the 1980s?A.An end to the OPEC embargoB.Peace in the Middle EastC.Discovery of new oil reservesD.The accident at Three Mile Island

The event that caused the United States to slow its construction of nuclear power plants in the 1980s was D. The accident at Three Mile Island.

Here are the steps to answer this question:

1. Understand the question: The question is asking about a specific event that led to a decrease in the construction of nuclear power plants in the United States during the 1980s.

2. Analyze the options: A. An end to the OPEC embargo: This event could potentially decrease the need for nuclear power as it would increase the availability of oil. However, it doesn't directly relate to the safety or construction of nuclear power plants.

   B. Peace in the Middle East: This could potentially impact oil prices and availability, but again, it doesn't directly relate to the construction of nuclear power plants.

   C. Discovery of new oil reserves: Similar to option A, this could decrease the need for nuclear power but doesn't directly impact the construction of nuclear power plants.

   D. The accident at Three Mile Island: This was a significant nuclear accident that occurred in the United States in 1979. It led to widespread fear and concern about the safety of nuclear power, which could directly lead to a decrease in the construction of new nuclear power plants.

3. Choose the correct answer: Based on the analysis, the correct answer is D. The accident at Three Mile Island. This event directly impacted public and governmental attitudes towards nuclear power, leading to a slowdown in the construction of new plants.