Which of the following statements can be associated with Borh’s theory of the atom? I. an electron orbiting the nucleus can change it’s energy continuously.

II. an electron orbiting the
nucleus emits energy and falls into the nucleus.

III. an electron orbits the nucleus without radiating energy and can change its energy only by specific, quantized sized amount when it moves between the orbits.

IV. electrons can only orbit the nucleus in specific circular orbits with a fixed angular momentum and energy.

(quick help!! and provide and explanation also if you can)