Complete The Sentences

Which ones are correct?

1- There are a lot of people all over the world trying to prevent wars..................

A) but their efforts fail because bad ones are often more powerful than them
B) no matter what those good people do to end the wars in and around their region
C) which means the wars will continue to take the lives of innocent people
D) so we must combine our efforts to help the people escape from the war zone
E) and this means the war in the region is going to last longer than expected

I said A

2- ................................., thus making the life cycle of electronic products shorter and shorter

A) It's not easy to get accustomed to the idea of buying a new phone every six months
B) A huge electronics shop is going to be opened somewhere near here
C) In rural areas, there are many people who still use a cell phone that is rather old
D) Technology is constantly changing faster than at any other time in history
E) Basically you used to have a choice of three telephone colours: tan, white or black

I said D

3- Some experts say the low growth rate in population is a result of falling birth rates...................

A) no matter how significant it may seem to the other members of the committee
B) as long as the government continues to implement the measures taken previously
C) unless something more radical is done to control this unforeseen rise in population
D) while others claim the main reason is fewer immigrants because of the recession
E) and so the number of people living in these regions is increasing constantly

I said D

Thanks.