Question

Beginning in the 1600s, the Tokugawa shoguns who ruled Japan tried to maintain stability and order by
A. increasing trade with Europeans.
B. conquering nearby countries to creat barriers to invasion.
C. developing a new style of writing that was not related to the earlier form of Japanese writing, which had been inspired by Chinese writing.
D. closing the country off from contact witht he outside world to prevent disruption by foreigners.
Please answer quickly!