The following diagram schematically represents the energy levels of electrons in an atom with larger circles representing orbits of higher energy, and the distance between circles representing the differences in electron energies.
If one considered the electron transitions C-to-B and B-to-A,
    A) the emission line arising from C-B would be bluer than that from B-to-A
    B) the emission line arising from C-B would be redder than that from B-to-A
    C) both emission lines would have the same color since they come from the same atom
    D) neither transition would result in an emission line

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