Final answer:
Ignoring the complaint against him, Ben risks a default judgment being entered, where the plaintiffs could win the case by default and he could be held responsible for Lexie's death and be required to pay damages.
Step-by-step explanation:
If Ben does not take action with respect to the complaint, the realistic outcome is option b) The plaintiffs can seek a default judgment and Ben will be found responsible for Lexie's death. In legal proceedings, if a defendant does not respond to a complaint by the given deadline, the plaintiff may ask the court for a default judgment, which is essentially a judgment in favor of the plaintiff because the defendant has not defended themselves or contested the case.
Ben ignoring the complaint does not make it go away and failing to respond could result in the court ruling that he must pay the $1 million to Lexie's family by default.