It kind of depends on whether you are some innocent bystander, or some employee of the trolley system who is actually trained and certified to pull that lever t

It kind of depends on whether you are some innocent bystander, or some employee of the trolley system who is actually trained and certified to pull that lever to divert that trolley and tasked with minimizing the loss of life. Given that the way the problems are presented as if the decider is an innocent bystander, perhaps inaction is the most sensible choice.