According to the Bohr Model for a Hydrogen Atom, the Lines

According to the Bohr model for a hydrogen atom, the lines on the hydrogen emission spectrum are related to what type of energy change?

A) Electronic transitions from a higher energy state to a lower energy state.
B) Electronic transitions from a lower to a higher energy state.
C) The amount of energy released during high speed collisions of hydrogen molecules.
D) The amount of energy released when hydrogen molecules are split into hydrogen atoms during an electrical discharge in a vacuum tube.
E) None of these.