Under the rule of caveat emptor, the producer of a defective product that caused injury to a consumer was:

a. not liable unless there was a contractual relationship between producer and injured party b. liable in tort law to any injured consumer if negligence by the producer could be shown
c. liable in tort law to consumers who bought the good under the rule of strict liability
d. liable in contract to all consumers who used the product under the rule of res ipsa loquitur
e. not liable in tort or in contract law