Your company is considering two mutually exclusive projects, A and $B,$ whose costs and cash flows are shown below. Project $A$ is of average risk while project $B$ is of higher risk. Projects of average risk are analyzed using the WACC as below indicated. Projects of higher risk are analyzed using a $3\%$ risk premium above the WACC. Choose the correct recommendation.

$\backslash$table$[[$WACC$,11\mathrm{.}00\%,,,,],[$Year$,0,1,2,3,4],[$Cash Flow A$,-3,000,950,1,050,1,100,1,200],[$Cash Flow B$,-3,990,1,235,1,365,1,430,1,560]]$

a$.$ The two projects have about the same NPV$,$ but since the IRR of project $B$ is materially higher than the IRR of project $A,$ project $B$ is recommended.

b$.$ The two projects have about the same NPV$,$ but since the IRR of project $A$ is materially higher than the IRR of project $B,$ project $A$ is recommended.

C$.$ While both projects' IRRs are above their respective IRR thresholds, since the NPV and the IRR of project A are both higher than the NPV and the IRR of project B$,$ project $A$ is recommended.

d$.$ While both projects' IRRs are above their respective IRR thresholds, since the NPV and the IRR of project $B$ are both higher than the NPV and the IRR of project $A,$ project $B$ is recommended.