The Collapse of the Han Dynasty Affected Trade in Which

The collapse of the Han dynasty affected trade in which important way?

A) Trade virtually came to a standstill following the fall of the Han empire.
B) Trade over land came to replace trade by sea, the preferred mode of transport under Han rule.
C) Chinese trade flourished as commercial centers sprang up in the south.
D) Merchants profited by selling arms and supplies to warring Chinese elites.