The present value of invested is lowered when
1. Correct option The discount rate increases because the future
cash flows are discounted so (1+ discount rate) is at the
denominator. So higher the denominator lower is the present
value.
All other options are incorrect (option 2 & 4 are incorrect)
because if riskiness decreases then discount rate will decrease and
since ( 1+ discount rate is at the denominator lower the
denominator higher the present value of investment. Option 3 is
incorrect higher cash flows or lower cash flows might result in
higher or lower npv depending on discount rate whether it is lower
than crossover rate or higher than cross over. Cross over rate us
the rate at which both the higher initial cash flow and lower
initial cash flows which are same NPV
Best of Luck. God Bless