Assume That Subsidiaries X and Y Often Trade with Each

Assume that Subsidiaries X and Y often trade with each other. Assume that Subsidiary X has excess cash while Subsidiary Y is short on cash. How can Subsidiary X help out Subsidiary Y?

A) X should lag its payments sent to Y to pay for imports from Y.
B) X should request that Y lead its payments to be sent for goods that Y sent to X.
C) A and B
D) None of the above