Question

15. Use the following passage to answer the question. (1) Water is something most of us take for granted. (2) If we need a cold drink or want to take a shower, water is there. (3) If we want to water our yards or wash the dishes, water is there. (4) For many parts of the world, however, this is not true. (5) Water is not everywhere it's miles away. (6) To get water involves a long walk to and from the source. (7) Traditionally it is the job of women and children to spend their days searching for water. (8) Then, they gather it to bring back to their homes. (9) Sadly, even after that water is found, only some of its clean and safe enough to drink. (10) A number of groups across the globe have spent decades helping people get better access to water. (11) One such organization is called water.org (12) It was started in 2009 by actor Matt Damon and Gary White, the co-founder of Water partners. (13) What have they accomplished so far Which sentence needs a question mark added to be correct? A. (9) Sadly, even after that water is found, only some of its clean and safe enough to drink. B. (13) What have they accomplished so far C. (10) A number of groups across the globe have spent decades helping people get better access to water. D. (1) Water is something most of us take for granted.

Answer 1

The correct answer is
B. (13) What have they accomplished so far

This sentence is a question that begs for the answer of what they have managed to do form the organization's founding up until now. That's why it needs to have a question mark at the end. It even has "what" which is one of the 5Ws of questions asking.

Answer 2

It would be B. 
B needs a question mark because it is a question.