Ionic bond and covalent bond are common chemical bond. What is the correct statement about chemical bond?

A、Achemicalbondisastronginteractionbetweentwoadjacentmolecules
B、Chemicalbondscanexistbetweenionsoratoms
C、Theparticlesthatmakeuptheelementarymoleculesmusthavecovalentbonds
D、Hydrogenbondisaspecialchemicalbond