Final answer:
The option a is the right answer.
Step-by-step explanation:
The statement that best reflects the credibility of the informant and the legality of the police actions in this case is option a. The officers had probable cause to search and the women is credible.
The woman contacted the police and provided specific details about the suspect's vehicle, including the license plate number.
This information, along with the fact that the suspect had shown her marijuana and planned to transport drugs to a specified area, gave the police probable cause to suspect that a crime was being committed.
Based on this probable cause, the officers were justified in stopping and searching the vehicle, and subsequently arresting the suspect.