In the Figure Below, the Shape of the Curve Is

In the figure below, the shape of the curve is dictated by which of the following factors? Please select all that apply.

A) At long distances there is no interaction between the atoms as the orbitals are not able to overlap.
B) At very short distances the atoms repel strongly as the positive nuclei come into close contact.
C) The equilibrium between repulsive and attractive forces generates the bond length between the atoms.
D) As the atoms become close enough together the orbitals overlap and the atoms are drawn together as bonding occurs.