Aman is accused of a brutal beating of a young woman. he claims that he never struggled with her, despite several eyewitnesses seeing him with the woman. several hairs from the woman's head are found at the crime scene. the hairs are analyzed by a hair expert. the hair expert explains that he is certain that the hairs have been pulled from the victim's head. how do we know that the hairs have been pulled?
a) a small medullary index is present.
b) chevron scale patterns were noted.
c) the follicular tags are stretched.
d) the medulla patterns are elongated.