In Which of the Below Situations Will a Police Officer

In which of the below situations will a police officer have the right to make a warrantless arrest of an individual?

A) Police officer observes the individual commit a minor traffic offense.
B) Police officer sees an individual steal a newspaper from a newspaper rack.
C) Police officer is informed by telephone from the local police that the individual is wanted for a felony.
D) Police officer has probable cause to believe that the individual has committed a felony.
E) A legal warrantless arrest may be made in all the above situations.