Which statement best describes the reasoning the author employs in the third paragraph (lines 42-61)?
A) The author explains a behavioral trait unique to
duckbills by drawing an analogy with a
behavioral trait unique to birds.
B) The author accounts for the presence of certain
attributes in duckbills by appealing to a general
biological principle.
C) The author refutes a theory about the purpose o
particular features in duckbills by proving that
the theory rests on a false assumption.
D) The author shows that an argument about a
single duckbill species applies to all duckbill
species.