Which of these is a problem with using nuclear energy?

A.
It is very expensive to use.

B.
It is a non-renewable energy source.

C.
There aren't enough qualified technicians.

D.
We don't have a way to contain the radioactive waste produced.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.