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.

people had jobs and began to work. that’s why the commercial revolution was great.

the border between arizona and new mexico is a thin, black line; this indicates a state boundary.

its correct: it's a thin line, and it's a state boundary, correct

during world war ii, the united states officially had no propaganda, but the roosevelt government used means to circumvent this official line. one such propaganda tool was the publicly owned but government-funded writers' war board (wwb).

explanation:

i beleive a. is the only possible answer