$140\mathrm{.}067$ points

In the deadlock example shown in Figure $8\mathrm{.}3\mathrm{.}1,$

a deadlock may occur sometime, but not necessarily every time.

a deadlock may occur sometime only if there are more than one instances of thread$\_$one and thread$\_$two are running.

a deadlock is guaranteed to occur.

a deadlock is guaranteed to occur as long as there are more than one instances of thread$\_$one and thread$\_$two are running.