Sue Jackson Was Recently Pulled Over by a Local Law

Sue Jackson was recently pulled over by a local law enforcement agency. She was not sure why she was being pulled over. When the officer approached the car, he informed Sue that he was going to search the car. The officer did not find anything until he opened a backpack that belonged to her brother. When the officers opened the backpack, he found two rocks of crack cocaine. Sue was immediately arrested and is currently awaiting a court date. Does the officer have a constitutional right to search Sue's car?

A) Yes, law enforcement can search a vehicle at any time.
B) Yes, Sue may have committed a traffic offense.
C) No, Sue did not consent to a vehicle search.
D) No, the officer could only search the trunk.