Life cycle costing

Hi dear Tutor I took all of the following questions from Kaplan

Question first

Which of the following are said to be benefits of life cycle costing?

1) It provides the true financial cost of a product
2) The length of the lifecycle can be shortened
3) Expensive errors can be avoided in that potentially failing products can be avoided
4) Lower costs can be achieved earlier by designing out costs
5) Better selling price can be set
6) Decline stages of the lifecycle can be avoided

I selected here 1,2.3.4.5 but in the answer shows 1,3,4, and why not 2-“shortening the length of a lifecycle is not desirable and decline (for most products) inevitable”

Second question
The following statements relate to the justification of the use of life cycle costing:

1)Product life cycles are becoming increasingly short.This means that the iniitial costs are an increasingly important component in the product’s overall costs

2)Product costs are increasingly weiighted to the start of a product’s life cycle, and to properly understand the profitability of a product these costs must be matched to the ultimate revenues

3)The high costs of (for example) research, design and marketing in the early stages in a product’s life cycle necessitate a high initial selling price

4)Traditional capital budgeting techniques do not attempt to minimise the costs or maximise the revenues over the product life cycle

here i selected 1,3 and 4 which is correct

my question here is that if we compare two questions i see contradictory opinion between

2) The length of the lifecycle can be shortened which can not be considered benefit and 1)Product life cycles are becoming increasingly short.This means that the iniitial costs are an increasingly important component in the product’s overall costs-it has been given right option