11. There are several resonance structures of sulfate ions. Which statement about the most stable Lewis structure of the sulfate ion is invalid? (A) The sulfate ion has a tetrahedral geometry. (B) The sulfate ion is nonpolar. (C) The overall charge of the sulfate ion is 0 in the most stable Lewis structure. (D) All sulfur-oxygen bonds are equivalent. (E) The sulfur atom has an expanded octet.