An assembly line is to produce $338$ items in a standard $8$ hour day. What is the appropriate takt time?

A$.170\mathrm{.}42$ units$/$hour$.$

B$.42\mathrm{.}25$ units$/$minute$.$

C$.85\mathrm{.}21$ seconds$/$unit$.$

D$.$ Cannot be determined without knowing what the activity times are.