[单选题]
1. Which bonds are responsible for the fax9eh5 v) ;hjcohesive properties optqrhw39ls21laporx :6:5* evvc2um8b sz .af water molecules?
A. Hydrogen bonds between water molecules
B. Hydrogen bonds within water molecules.
C. Covalent bonds between water molecules.
D. Covalent bonds within water molecules.
