what is the difference between probable cause and reasonable suspicion?

A a search warrant can only be issued with reasonable suspicion
B probable cause is the level of evidence schools need. but police need to have reasonable suspicion
C reasonable suspicion is actual knowledge that a crime probably has been committed
D with probable cause, there is actual knowledge that a crime has been committed; with reasonable suspicion, there is no actual knowledge

The correct answer is D: with probable cause, there is actual knowledge that a crime has been committed; with reasonable suspicion, there is no actual knowledge.

Probable cause is a higher standard of evidence than reasonable suspicion. It requires that there is a reasonable basis to believe that a crime has been committed, based on specific facts and circumstances. It is necessary to obtain a search warrant or make an arrest.

Reasonable suspicion, on the other hand, is a lower standard of evidence. It is based on specific facts that would lead a reasonable person to suspect that criminal activity is occurring or that a person is involved in criminal activity. Reasonable suspicion grants law enforcement officers the authority to briefly detain and question individuals, but it does not justify a full search or arrest without additional evidence.