Consider the following network. Activity L has an activity time of $4$ and immediately precedes activities M$,$ P$,$ and T$.$ The latest start times for activities M$,$ P$,$ and T are $22,19,$ and $27,$ respectively. The latest finish times for activities M$,$ P$,$ and T are $29,27,$ and $33,$ respectively. What is the latest start time for activity L$?$

A$.22$

B$.13$

C$.15$

D$.33$

E$.37$