Answer:
The right answer here is a. 
a. of pressure put on them by the westward migration of the Huns.
Explanation:
The Germanic tribes had a long, several-century history of conflict and interaction with the Romans. In the 4th century CE, hosts of a ferocious Asian nomad people, the Huns, were on the move from the east. They crossed the Volga river, attacked and vanquished the Ostrogoths in Eastern Europe. The Visigoths implored the Romans for sanctuary within the limits of the empire. 
 
        
             
        
        
        
Answer:
B
Explanation:
writ of habeas corpus (which literally means to "produce the body") is a court order demanding that a public official (such as a warden) deliver an imprisoned individual to the court and show a valid reason for that person's detention.
 
        
             
        
        
        
Answer:
Economic recovery from the Panic of 1837 was incomplete, and Whig nominee William Henry Harrison defeated incumbent President Martin Van Buren of the Democratic Party. The election marked the first of two Whig victories in presidential elections
Explanation:
 
        
             
        
        
        
In an effort to relieve the caseload burden in the Supreme Court and to handle a dramatic increase in federal filings, Congress, in the Judiciary Act of 1891, established nine courts of appeals, one for each judicial circuit.