<span>(C) is the most correct answer. With new journalism, there are many more people who hold the title of "journalist" in the current climate. This makes for a great deal more competition in the race to get a scoop out to the public. Finding the hot new story and being the first to report it is becoming tougher than ever.</span>
Contrast analysis comparison
"Some stores have closed because of the snow." This action is happening in the past, so either "have" or "has" will be used. It is "have" in this case because "stores" is plural.