Karl Bought a Used Car from Car City and He

Karl bought a used car from Car City and he had constant problems with the car. Karl was so angry that he parked the car opposite Car City on his friend's parking lot and drew arrows on the car pointing to all the things that had gone wrong and words that said Car City sells rotten cars. If Car City sues Karl most likely a court would rule

A) Karl is liable for product defamation
B) Karl is liable for slander
C) Karl is liable for trespass
D) Karl is liable for breach of confidential information
E) Karl has not nothing illegal