Answer this question based on the following four statements: 1. increasing the discount rate will increase the present value of an annuity. 2. increasing the payment amount in an annuity will increase the present value of an annuity. 3. purchasing $1,000 in new equipment to manufacture backpacks, your number one product, is an example of opportunity cost. 4. choosing public transportation to travel to a particular destination is an example of opportunity cost. O a. 1 and 3 are correct. Ob. 1, 3 and 4 are correct. O c. 2 and 3 are correct. O d. 2 and 4 are correct. e. only 3 is correct