Exercise 3: Rewrite the second sentence in such a way that it has the same meaning as the one before it

You can’t visit the United States unless you get a visa.

• A. 
  If don't you get a visa, you can't visit the United States.
• B. 
  You will get a visa if you visit the United States.
• C. 
  If you got a visa, you can't visit the United States.
• D. 
  You can visit the United State if you will get a visa.