Ingrid is analyzing several fibers found at a crime scene. She knows that they are natural fibers but is unsure of their origin. Which origin would cotton and wool have? Ingrid believes that one of the fibers is cotton. This fiber is categorized as coming from a (n) origin. The other fiber is wool. This fiber comes from a (n) origin.
a) Cotton - Plant origin; Wool - Animal origin
b) Cotton - Animal origin; Wool - Plant origin
c) Cotton - Synthetic origin; Wool - Plant origin
d) Cotton - Plant origin; Wool - Synthetic origin