Answer:
Morally wrong
Step-by-step explanation:
From a utilitarian perspective the action of the body guard would be tagged as morally wrong, because it is of the view of the utilitarian that an action should be for the greater good of people irrespective of whether that action is a bad action.
Thus, since the target was the politician, he would have allowed the assassin take the life of the one man - the politician so as to avoid fifteen people been killed, and four wounded.