Which of the following reforms of Diocletian helped Rome to survive for another 200 years?

He split the Empire into two parts.

Explanation:

Diocletian believed that the Empire grew so fast and it was so big that just one person couldn't control it. So, he split the Empire into two parts: Greek-speaking East (Greece, Anatolia, Syria, and Egypt) and the Latin-speaking West (Italy, Gaul, Britain, and Spain). Afterward, he would split into four parts, once the crisis and conflicts between the rulers obliged him to do so.

they remained in rural areas and worked at jobs such as lumbering or farming.

the answer is a. since they were a huge producer of cotton and wanted the most money for it.