In the $"$EC Banana Case" $...$

a$.$ The European Communities were found to have violated the most favoured nations principle because the requirements to import bananas differed from certain nations, and went substantially beyond the requirements to import bananas from others.

b$.$ The European Communities were found to have violated the national treatment rule because the requirements to import bananas differed from certain nations, and went substantially beyond the requirements to import bananas from others.

c$.$ The European Communities were found to have violated the general restriction on qualitative restrictions.

d$.$ The European Communities were found to have violated the Tariffs and Binding Concessions Rule because the requirements to import bananas differed from certain nations, and went substantially beyond the requiremerts to import bananas from others.

e$.$ None of the above