Yes; every object has energy and you cannot create or destroy energy but you can transfer it.
To answer this question, we can use the following equation:

where e is the energy change, h is Planck's constant, c is the speed of light (m/s), and lambda is wavelength in meters. So then we can plug in the information:



So the energy that is omitted by the atom is
.
1 mole ------------ 6.02x10²³ atoms
5.88 moles ---- ?
atoms = 5.88 * 6.02x10²³ / 1
= 3.539x10²⁴ atoms
hope this helps!
I believe that A is the answer. :)