Which popular press headline does not suggest that a multiple regression has been used? a. "dog ownership decreases stress"b. "after taking into account job experience, people who are happier with their jobs report greater productivity"c. "after correcting for several factors that affect memory, including intelligence, researchers found that people who read more frequently remember 12% more about a crime scene than those who don't read frequently" d. "the link between traumatic experience and the development of anxiety symptoms existed even when controlling for the effect of parental anxiety"