Answer:
Option D. Its presence lengthens both a firm's average collection period and its average payment period
Explanation:
The increase in the float, increases the investment in the working capital so the Option A is incorrect
The reason is that it is the time period from the time the cash was deposited in the company's account to the time its was credited due to the payment to the vendors. If the floating time is increased then the collection period and payment period are increased which is the option D and is totally opposite to option B and C.