[单选题]
Covalent bonding is d3a9 rey3 siocyi*/j0c1znt9joj) i ch+u8 : y2.b4xo kvt5sxoaused by
A. the sharing of electrons between atoms.
B. the transfer of electrons between atoms.
C. unequal charge distributions around neutral molecules.
D. atoms bonding to hydrogen molecules.