The answer is C: the characters often face problems related to future technological advancements.
Science fiction is usually set in dystopian and futuristic scenarios where the advancement of technology has presented the characters in the story with novel social and personal problems that are to be solved. Science fiction, thus usually represent fictional problematics that, given the light that the story sheds on these problems, can be incorporated into a current critique of contemporary and actual social and personal conditions.
The answer would be C, because science fiction is based on futuristic stories. Or, it can also be described as what people imagine the distant future to be like.
C "The dog turned up..." means it showed up, was returned etc. Etc. The details of how the dog turned up are not important..what is..is that your dog is home.
