Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 3 to 6.

In a world where 2 billion people live in homes that don't have light bulbs, technology holds the key (3)______ banishing poverty. Even the simplest technologies can transform lives and save money. Vaccines, crops, computers and sources of solar energy can all reduce poverty in developing countries. For example, cheap oral-rehydration therapy developed in Bangladesh has dramatically cut the death (4)______ from childhood diarrhea.     

But even when such technologies exist, the depressing fact is that we can’t make them cheap enough for those (5)                    most need them. Solar panels, batteries and light bulbs are still beyond the purse of many, but where they have been installed they change lives. A decent light in the evening gives children more time for homework and extends the (6)                      day for adults.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blank 3.