A clutch is being selected to start a load. The machine cycles once every $7$ seconds $($start$-$function$-$stop$).$ Assume the start and stop times are equal, and the machine need $4$ seconds to accomplish its function. In how many seconds must the clutch be able to operate $($reaction time plus time to start the load$)?$

A$.1\mathrm{.}25$ seconds

B$.7$ seconds

C$.1\mathrm{.}5$ seconds

D$.3$ seconds