An analyst does research about opportunity cost and gathers the following information about three fixed income products available for the public:
| Fixed Income Product | Interest Rate |
| 1 | 3.3% |
| 2 | 4.4% |
|
| 3 | 6.6% |
If each fixed income product has the same maturity and default risk, the opportunity cost of investing in product 2 is closest to:（）
A. 0.0%
B. 1.1%
C. 2.2%