The government tried to stop the new york times from publishing classified material by using a concept known as
a. the espionage act.
b. prior restraint.
c. symbolic speech.
d. clear and present danger.

The correct answer is:  

B. prior restraint.  

In 1971 the US government solicited a restraining order that prevented the Times from posting any further articles based in the Pentagon Papers. The claim was prior restraint, which means the Government can show sufficient evidence that the publication would cause a "grave and irreparable" danger.

Later on, the New York Times Co. v. United States (1971) ruling made it possible for The New York Times and The Washington Post newspapers to publish without risk of government censorship or punishment.

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.