$An$ assembly line has $10$ stations with process times $of1,2,3,4,$dots,$10$ respectively. The

process time $of$ the system $is$

$A18\mathrm{.}18\%of$ the process cycle time.

$B100\%of$ the process cycle time.

$C550\%of$ the process cycle time.

$D50\%of$ the process cycle time.

$E2\%of$ the process cycle time.