The word ‘which’ in the third paragraph refers to …………

Are from “which” in paragraph 3 refers to _____.

A. bottled water

B. water supply

C. solution

D. human consumption

Information: In fact, most city dwellers in developing countries are forced to boil their water or to buy bottled water, which is very expensive.

In fact, most city dwellers in developing countries are forced to boil water or buy bottled water, which is extremely expensive.

→ Answer A