Step 1: Understanding the Correct Preposition
The correct preposition here is "among," because "among" is used when referring to more than two things or people that are considered as a group. The election was a fight between multiple parties, so the appropriate preposition is "among."
Step 2: Evaluating the Other Options
- "Around" (Option B) refers to being on the perimeter or surrounding something, which doesn’t fit this context.
- "Along" (Option C) is used when talking about a line or path, which does not fit this sentence.
- "Across" (Option D) is typically used to describe movement from one side to another, which is also incorrect here.
Step 3: Conclusion
Thus, the correct preposition is "among," making the sentence: "The election was a straight fight among the four parties."