13. Consider a molecular compound with the formula XZ2, where "X" and "Z" are

unknown elements. The X-Z bond is polar, but the XZ2 molecule is nonpolar.

Which statement must be true?

A. XZ2 must violate the octet rule.

B.

XZ₂ must have a trigonal bipyramidal electron domain geometry.

XZ2 must have a trigonal bipyramidal molecular geometry.

C.

D.

XZ2 must have a linear electron domain geometry.

E.

XZ2 must have a linear molecular geometry.