What Are All the Intermolecular Forces That Are Responsible for the Existence

Multiple Choice

What are all the intermolecular forces that are responsible for the existence of the molecular solid oxalic acid, H₂C₂O₄?

A) Dipole-dipole, London forces, and hydrogen bonding
B) Dipole-dipole and London forces
C) Hydrogen bonding and dipole-dipole
D) London forces
E) Dipole-dipole and ion-ion