; (B) provides a foreign address; (C) uses a check or other written instrument drawn on a foreign bank, or by a wire transfer from a foreign bank, in carrying out the activity; or (D) resides abroad. (d) Substantial assistance defined As used in this section, the term substantial assistance means, with respect to an activity prohibited by paragraph (1) or (2) of subsection (a), involvement with an intent to facilitate successful completion of the activity. .