The orrect answer for above ststement is:
C. They are often amines
Amines ara covalent compounds and they coomomly are bases because they have lonley pair of electrons which can accept protons.
Explanation:
In the Lewis model, the H+ ion is the mobile species it receives a couple of electrons from the OH- ion to form a covalent bond. While the Lewis theory of acid-base reactions, bases distribute pairs of electrons and acids allow sets of electrons