Clear my choice

The table below shows the future cashflows of three different projects. Which project has the highest PV$?$ Assume that you use the same positive discount rate for all three projects.

$\backslash$table$[[,$Year $1,$Year $2,$Year $3],[$Project $1,520,500,480],[$Project $2,480,500,520],[$Project $3,500,500,500]]$

a$.$ Project $1$

b$.$ Cannot be determined without knowing the exact discount rate

c$.$ Project $3$

d$.$ All are equally attractive

e$.$ Project $2$