其实，不发达地区大都拥有丰富的资源，发展潜力很大。
选项：

A:In fact, most of the less developed areas are rich in natural resources, yet have great potentials for development.
B:In fact, most of the less developed areas are rich in natural resources, and have great potentials for development.
C:In fact, most of the less developed areas are rich in natural resources, but their development potential is very great.
D:In fact, most of the less developed areas are rich in natural resources, as their development potential is very great.