A job J $1$ has two successors $J2$ and J$3.$ Job $J1$ has a feasible interval of $(2,8].$ Similarly J $2$ and $J3$ have feasible intervals $(2,6]$ and $(2,10]$ respectively. What is the effective deadline of the job J$1?$

Select one:

a$.2$

b$.10$

c$.6$

d$.8$