Suppose that it is 20 April and a lender realises that on 14 September it will have $5 million to invest for a period of 180 days. The lender is concerned that the Reserve Bank of Australia will lower interest rates before 14 September. If the lender could use 90-day Bank Accepted Bill futures to hedge against a decline in interest rates, what position should the investor take in BAB futures and how many contracts would the investor need?

A. Short 10 contracts

B. Short 5 contracts

C. Long 10 contracts

D. Long 5 contracts