其实，不发达地区大都拥有丰富的资源，发展潜力很大。______ A: Infact,mostofthelessdevelopedareasarerichinnaturalresources,yethavegreatpotentialsfordevelopment. B: Infact,mostofthelessdevelopedareasarerichinnaturalresources,andhavegreatpotentialsfordevelopment. C: Infact,mostofthelessdevelopedareasarerichinnaturalresources,buttheirdevelopmentpotentialisverygreat. D: Infact,mostofthelessdevelopedareasarerichinnaturalresources,astheirdevelopmentpotentialisverygreat.