Which method is used to launder money via wire remittances sent through a bureau de change or money services business?

[answerhappygod]

Which method is used to launder money via wire remittances sent through a bureau de change or money services business?

A. A customer in country A makes a weekly small wire transfer to the bank account of an individual in country B.
B. A customer in country A makes frequent wire transfers to a single customer in country B that are slightly under the legal reporting threshold.
C. A large number of wire transfers are sent from a large number of senders in country A to a large number of recipients in country B during the period of December 1 to December 15.
D. A customer in country A receives four small wire transfers from four different individuals located in country B on December 21. The aggregate of the wire transfers falls below the legal reporting threshold.