A word or phrase that modifies a word not included in the sentence is a B. dangling modifier.
For example:
Knowing that it was getting cold outside, the pizza tasted very good.
Given information is not enough to answer your question appropriately. Let me start explaining with the cases that we can extract from given information:
Case 1: Stacy was driving the car - in this case, Stacy was in driver seat.
Case 2: Someone else was driving the car - in this case, Stacy was in passenger seat.
