What is the difference between probable cause and reasonable suspicion?

[] With probable cause, there is actual knowledge that a crime has been committed; with reasonable suspicion, there is not actual knowledge.
[] Probable cause is the level of evidence schools need, but police need to have reasonable suspicion.
[] Reasonable suspicion is actual knowledge that a crime has been committed, and probable cause means that a crime has probably been committed.
[] A search warrant can only be issued with reasonable suspicion.

The correct answer is: With probable cause, there is actual knowledge that a crime has been committed; with reasonable suspicion, there is not actual knowledge.