What is a covalent bond ?

What is a covalent bond ?
Answer is c A bond between two atoms resulting from a transfer of an electron.
Explanation:
A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
A covalent bonds is a bond between two atoms that is made up of share electrons.
Options B is correct.