Unrestricted submarine warfare
        
             
        
        
        
A filibuster in the United States Senate is a strategy utilized in the United States Senate in order to keep a measure from being brought to a vote.
<u>Explanation:</u>
The most widely recognized form of delay happens when at least one congresspersons attempts to postpone or hinder a decision on a bill just by expanding banter on it. 
In 1917 congresspersons embraced another standard (rule 22) at the asking of President Woodrow Wilson, which enabled the Senate to end a discussion with a 66% greater part vote (utilizing a gadget known as cloture).
 
        
             
        
        
        
Answer:
C
Explanation:
Wind currents do carry radioactive materials, this is why America doesn't nuke countries like North Korea because of it's impact on allied countries such as Japan and South Korea,
 
 
        
                    
             
        
        
        
Answer:
seeking greater economic opportunity
Explanation:
 
        
                    
             
        
        
        
A map will use latitude and longitude to show you where any place is in the world those are the little lines on the map