What Evidence Suggests That Na⁺ Ions Are Very Weak Oxidizing

What evidence suggests that Na⁺ ions are very weak oxidizing agents?

A) NaCl is a strong electrolyte
B) Na metal does not occur in the Earth's crust
C) NaOH is a strong base
D) Na metal is soft and can be cut with a knife
E) Na⁺ ions are a component of table salt