JCF, a large money market mutual fund, invests exclusively (i.e.,100%) in money market instruments as specified in its investment mandate.

Based on the above information, determine which of the portfolios below is most unlikely to be the investment portfolio held by JCF. (Note the percentages before the financial instruments represent their portfolio weights)

Portfolio A: 30% bank bills, 40% commercial papers, 30% 3-month Eurodollar deposits

Portfolio B: 30% T-bills, 40% 3-month Eurodollar deposits, 30% 1-week repos

Portfolio C: 30% T-bills, 40% American depository receipts, 30% overnight repos

Portfolio D: 30% 3-day repos, 40% bank bills, 30% commercial papers