Subcomponent J has a one week lead time and a gross requirement of $57$ units in Week $6$ to fill order $123.$ There are already $15$ J$\text{'}$s in stock at the beginning of the planning period and these are not needed for any other order other than $123.$ What should be the planned order release for J$\text{'}$s in order to build product at the latest possible completion time?

Question $22$ options:

A$)$

$42$ units in week $6$

B$)$

$57$ units in week $5$

C$)$

$42$ units in week $5$

D$)$

$57$ units in week $6$