Which of the following best describes the author's statement that "an emphasis on reality as invariably perceptually seamless may be an exaggeration" (lines 27-28)

A． An assumption based on evidence already presented
B． A concession to the view opposing that of the author's
C． A hypothesis concerning a possible problem with the nomenclaturist view
D． An allusion to an argument presented earlier in the passage
E． An example of the application of the author's view of language