Company A is delivering a product in three parts. The contract allows for the parts to be delivered either one after other or at the same time.
Which type of project phasing will allow for the most flexibility in the delivering the full product when product requirements are subject to rapid change?

A.
Sequencing the delivery phases one after other

B.
Overlapping the delivery phases

C.
Delivering the products iteratively

D.
Delivering all of the products at the same time.