We see that the Netherlands, Belgium, and Ireland trade considerably more with the United States than with many other countries.
A.
This is explained by the gravity model, since they do not share borders.
B.
This is explained by the gravity model, since these are all large countries.
C.
This is explained by the gravity model, since these are all small countries.
D.
This fails to be consistent with the gravity model, since these are small countries.
E.
This fails to be consistent with the gravity model, since these are large countries.