A Sulfur Atom Has a Larger Atomic Radius Than an Oxygen

Multiple Choice

A sulfur atom has a larger atomic radius than an oxygen atom. Which statement best explains why?

A) Sulfur contains more electrons than oxygen does.
B) Sulfur contains more protons than oxygen does.
C) The valence shell of sulfur is farther away from the nucleus than the valence shell of oxygen is.
D) The larger number of protons in an oxygen atom pulls its electrons closer to the nucleus than a sulfur atom.