Max worked in a warehouse owned by Fortress Storage Inc. His job consisted mainly of moving and storing expensive and sensitive pieces of computer equipment that Fortress had received from its customers. Unfortunately, while Max normally was among the company's most trusted workers, he carelessly dropped a computer that belonged to HAL Inc. and that HAL had asked Fortress to store. Which of the following statements is TRUE?

a. Fortress may be vicariously liable only if a court decides that Max is not liable.
b. Max may be vicariously liable for Fortress's tort even if HAL's equipment was damaged while Max was doing something that Fortress had told him not to do.
c. If Fortress is held vicariously liable, then HAL will be prevented from suing Max.
d. The court may apply the doctrine of vicarious liability only if Fortress has liability insurance.
e. As a matter of risk management, Max and Fortress both should have purchased liability insurance.