Lisa observes that in group 17, ions increase in radius from top to bottom. Which explanation best accounts for this observation? Group of answer choices

A)From top to bottom, added electrons occupy increasingly lower principle energy levels.

B)From top to bottom, added electrons occupy increasingly higher principal energy levels.

C)From top to bottom, added protons pull more strongly on electrons.

D)From top to bottom, the ions in this group have greater and greater negative charges.