I have the answer to that question
<span>In 1433, neo-Confucian factions within the Ming court instituted an overtly isolationist policy that was to characterized China's trade policy into the 18th century. By this time, however, the Ming Chinese had colonized neighboring Annam, and established permanent commercial diaspora communities in Southeast Asia.</span>
The signal would be: prices.
When the prices of a certain product is high, it would give signals to the seller to increase the production of that product.
the prices also determine how much material and type of production technique that the sellers can afford to use.
Answer:
Name the major cashcrop grown in kilombero irrigation scheme in Tanzania? Rice
Explanation:
Have a great summer. I posted some information for you to read.