What is the general structure of an ionic compound?

Question

a group of two or more atoms sharing electrons
a group of two or more atoms sharing protons
a crystal lattice structure of cations surrounded by atoms
a crystal lattice structure of anions and cations

I think it is A

Answer 1

Let me point out that with no caps and no periods it really is tough to know where one sentence ends and another one starts. Even a souble space between a, b, c, d, would have helpe. Having said all of that I don't think the answer is a.

Answer 2

Would it be a crystal lattice structure of anions and cations since in order to for a crystal you need even amounts of anions and cations