Which statements apply to arguments of interaction occurrences? (Choose two.)

Which statements apply to arguments of interaction occurrences? (Choose two.)
A . Arguments to interaction occurrences only apply when the corresponding interaction is value returning.
B . The arguments may be constants (literals).
C . An argument of an interaction occurrence must only have simple types.
D . Arguments to interaction occurrences must always correspond to IN-parameters.
E . The arguments may refer to parameters of the enclosing interaction.

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Answer: BE