B. Overgeneralization
They are saying that "practically every teen cares" but have no real evidence to back that up. They may have polled a small group of teenagers and because the majority of them said they care about animals they generalized that information to represent everyone in the age group. Without a full poll or teens there is no way to know how many do or do not care about the welfare of animals.
The answer is c!!!!!!!!!!!!!!!!!!!!!!!!!!!
Option A is correct: Originally
“To begin with” could work, but “originally” is more concise. “Unfortunately” doesn’t fit the context. “So finally” wouldn’t work either, because it wouldn’t be preceding the final thought.
