Final answer:
The true statement is that c) nonpolar molecules can have polar bonds if the molecule is symmetric, causing the individual bond polarities to cancel out and result in an overall nonpolar molecule.
Step-by-step explanation:
The true statement about polar and nonpolar molecules is that nonpolar molecules can have polar bonds if the molecule is symmetric. In a symmetric molecule, the polarities of the individual polar bonds may cancel out, resulting in an overall nonpolar molecule. This can occur in several molecular shapes such as linear, trigonal planar, or tetrahedral geometries. For example, carbon dioxide (CO2) is a linear molecule with two polar bonds, but it is overall nonpolar because the polarities of the individual bonds cancel each other out due to the molecule's symmetry.