Sentence Correction

With a robust economy and well educated and well to do citizens, Zimbabwe was once the success story of Southern Africa, but over the last one and a half decades things have got harder for it as urban areas ceased to create jobs and rural areas felt the pressure as well
A. With a robust economy and well educated and well to do citizens, Zimbabwe was once the success story of Southern Africa, but over the last one and a half decades things have got harder for it as urban areas ceased to create jobs and rural areas felt the pressure as well
B. Zimbabwe, with a robust economy and well educate and well to do citizens, once the success story of Southern Africa, but over the last one and a half decades things have got harder for it as urban areas have ceased to create jobs and rural areas have felt the pressure as well
C. With a robust economy having well educated and well to do citizens, Zimbabwe was once the success story of Southern Africa, however over the last one and a half decades things got harder for it as urban areas ceasing to create jobs, with even rural areas feeling the pressure
D. Zimbabwe was once the success story of Southern Africa, with a robust economy and well educate and well to do citizens, but over the last one and a half decades things have got harder for it as urban areas ceased to create jobs and rural areas felt the pressure as well
E. With a robust economy and well educated and well to do citizens, Zimbabwe was once the success story of Southern Africa, but over the last one and a half decades things have got harder for it as urban areas have ceased to create jobs and rural areas have felt the pressure as well

OA is E
What attributes make option E correct, I would employ the help of an Expert to help me do justice to it.