Mary Is on Trial for Child Abuse

Mary is on trial for child abuse. Devin, Mary's defense attorney, has interviewed the following witnesses:
· Larry, Mary's brother who lives 500 miles away and has not visited Mary since June of last year, who states that he has never seen Mary abuse her children.
· Kathy, Mary's15-year-old babysitter, who claims that she saw the children's father hit them with a belt on March 1.
· Julie, a nurse at the clinic where Mary takes the children for medical care, who reported that the children came in for an appointment on March 2 and had bruises that she suspected were inflicted with a belt
· Isabel, a social worker for Children's Protective Services (CPS) , who testified at a civil court hearing on a petition filed against Mary by CPS, that on March 10 she saw numerous bruises in different stages of healing on the children.
· Henry, Mary's boyfriend, who insists he saw the children's father hit them with a belt on March 1. Whose testimony is most likely to be ruled immaterial?

A) Larry, because he has had no contact with Mary when the events at issue occurred.
B) Kathy because she is a minor.
C) Julie because she did not see anyone hit the children.
D) Henry because he is probably biased in favor of his girlfriend.