The Democratic republic of Congo not only has one of the world's largest populations, with over 56 million people, but also has one of the world's fastest growing populations, with an annual growth rate of 3.5 percent.

A) not only has one of the world's largest populations, with over 56 million people, but also has
B) not only has one of the world's largest populations, with over 56 million people, it also has
C) not only has one of the world's largest populations, with over 56 million people, but moreover it is
D) with over 56 million people, making it one of the world's most populous counteries,but also has
E) has one of the world's largest populations, with over 56 million people, but also has

I understand the answer. Kindly somebody explain me why in option D use of participle "making" create a sentence fragment.
Also where we can use "with" as a modifier and does "with" always modify the immediate noun.
In the following question a modifier with "with" is considered awkward

Museum goers who glanced up into the building's five story atrium often noticed that birds, with the behavior that was being studied by the museum staff's, were nesting in the rafters