The Nuclear Power Accidents at Chernobyl and Three Mile Island

The nuclear power accidents at Chernobyl and Three Mile Island are less likely in most modern U.S.nuclear power plants today because of

A) the use of different types of fuels in the nuclear cores that cannot cause a total meltdown.
B) increased reliance on robots to avoid human errors.
C) additional design features that provide more layers of safety.
D) new nuclear power plant designs that require only 1% of the nuclear fuel.