During the 1400s and into the 1500s all of the following made ocean exploration easier, except

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.

Why was russia drawn into a conflict with germany after ausria-hungary declared war on serbia ?

What will not cause political parties to change or develop