A vast network of roads and trade routes.
Hope that answered your question! :)
Prideful enough to lay down their lives for Japan
Exports rise more to China than to US, says SBI. The bank has suggested the Export Refinance Scheme to be reintroduced by the Reserve Bank of India in INR and foreign currency. While overall exports to US grew by 9.46% to $52.4 billion in FY19, for China the growth was 25.6% to $16.7 billion.
The answer would be C, different economics, because the northern states were going through an economic boom, due to industrialization. The southern states were running on slave labor.