When the price of a product increases, consumers will often demand and purchase substitute goods that are cheaper. true false?

What effect did john hay’s open door policy letters have on the imperial powers of britain, france, germany, russia, and japan? a. it provoked the imperial powers to declare war on the united states. b. it caused the imperial powers to restrict trade in their trade with china. c. it warned the imperial powers that the united states would soon declare war on china. d. it signaled to those powers that the united states would take a larger role in world affairs than before.

After the congress of vienna europe

What were some of the most important native items adopted by europeans ? what impact did they have on european life ?