There shall be no liability for loss due to fortuitous events in one of the cases.which is it.

A .when the debtors delays

B.when the parties so stipulated that there shall liability even in in case of loss due to fortuitous events

C.when the nature of the obligation requires the assumption of risks

D. When the obligation is to deliver a determinate thing and there was no stipulation as to the liability of the labor in case of lose due to fortuitous events.