A 2-Year-Old Boy Was Playing with His Toy Car When

A 2-year-old boy was playing with his toy car when his baby-sitter noticed that a small metal nut was missing from the car. Two days later the child developed a cough and became febrile.
-This child's illness could be explained by the following statements except which?

A) The child had inhaled the nut.
B) The metal nut could easily be seen on posteroanterior and right oblique radiographs.
C) The left principal bronchus is the more vertical and wider of the two principal bronchi, and inhaled foreign bodies tend to become lodged in it.
D) The nut was successfully removed through a bronchoscope.
E) Children who are teething tend to suck on hard toys.