Answer:
D. A double covalent bond because each atom requires two more electrons to complete its octet.
Step-by-step explanation:
Using elimination method to find the correct option.
The fact that it was stated that the diatomic molecule shared two pairs of electrons means that the type of bond present is a double bond.
A Double bond occurs when two atoms share two pairs of electrons with each other.
Due to this, options A and B cannot be correct. We are now left with option C and D.
A typical example of diatomic molecule with double bonds is the oxygen molecule.
In the oxygen molecule for instance, the two oxygen atoms are sharing four electrons. This means each atoms require two more electrons to complete its octet.