PLEASE HELP!!
7.
Today, Centralia is an eerie ghost town. The wafting smoke and shifting soil are too dangerous for most to brave. The detour signs on Route 61 give no indication of the troubles in Centralia; most cars just veer around the smoldering town. But for those who are fascinated by the fire, Centralia has become a sort of mecca. Tourists come to stare at the devastated landscape, and conspiracy theorists gather to share their outlandish ideas. Of the visitors, the researchers are the most hopeful. They study Centralia's soil, plants, and animals, and they believe that the effects of the fire will shed light upon the processes that created this planet. Though a terrible tragedy, the Centralia fire may someday lead to breakthroughs in science and technology.
Read the last sentence from paragraph 7.

...the Centralia fire may someday lead to breakthroughs in science and technology.

Why does the author choose to end the passage with this sentence?
A. to develop a new argument

B. to establish the science involved

C. to provide hope in spite of the tragedy

D. to reassure the reader that the fire will continue