Subsidiary A has excess funds, while Subsidiary B needs funds. If A purchases supplies from B, it could optimally provide financing by ________.

a. Extending a high interest rate loan to B

b. Borrowing a low-interest rate loan from B

c. Allowing B to lag its payments to A

d. Leading its payments to B

e. [Leading its payments to B] and [Allowing B to lag its payments to A]