working capital- operating cycle

Which of the following will shorten the cash operating cycle?
A An increase in the raw materials inventory holding period
B An increase in the trade payables days
C An increase in the trade receivables days
D An increase in the production period

sir A is the answer !
but then if there is a increase in the raw material holding period the production too will be delayed as well , so how come option A would shorten the cash operating cycle . thank you