Answer:
The Silk Road connected China with far-off lands. so it would be D
If we’re talking about WW2 then I believe your best answer is gonna be A) Enacting the draft
The global population rate rose most quickly around the 20th century, from about 1.5 billion at the start of the century to 6 billion at the end of it. The population had it's first significant change between the 18th century and the 19th. Based on the data, we can predict that global population will be between 10 and 13 billion at the year 2100.