Under current U.S. GAAP, which of the following activities by Banff Inc. is a cash flow associated with INVESTING?
a. Repurchase of Banff stock, previously in the hands of Banff's shareholders
b. Acquisition of bonds of Hinkley Inc.
c. Repayment of a loan from a local bank
d. Payment of semiannual interest on bonds issued by Banff
