Question

what caused americans to turn skeptical of the uses of nuclear power?
the number of nuclear plants created that have taken jobs away from coal miners
the initial uses of the power under the supervision of calder hall outside london
a partial meltdown in 1979 at the three mile island reactor in pennsylvania
their reputation as a source of cheap, pollution - free energy

Explanation:

The Three Mile Island accident in 1979 was a significant event that raised concerns about the safety of nuclear power. A partial meltdown occurred, which led to increased public skepticism. The other options do not directly relate to the cause of American skepticism. The number of nuclear plants taking jobs from coal miners is more about economic impact rather than safety - related skepticism. The initial uses of power under Calder Hall's supervision is a positive aspect of nuclear power development. Their reputation as a source of cheap, pollution - free energy is a positive perception, not a cause of skepticism.

Answer:

a partial meltdown in 1979 at the Three Mile Island reactor in Pennsylvania