Which of the following is an example of terrorism? 1. An anarchist learns to make sarin gas from ...

Which of the following is an example of terrorism?
 
  1. An anarchist learns to make sarin gas from an Internet source and uses the knowledge to set off a device in a shopping mall, which sickens scores of people.
  2. An environmental defense group lobbies a member of Congress and threatens intense campaigning unless the representative votes against a pending bill.
  3. A member of an animal rights group protests outside of a supermarket carrying a sign depicting the interior of a slaughterhouse and a fight breaks out with shoppers.
  4. A teen leaves a pipe bomb under the desk of his math teacher following a bad grade; the teacher was seriously injured.